Surgical Science North America Corp v. Sonosim Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Surgical Science North America Corporation (Delaware)
  • Defendant: SonoSim, Inc. (California)
  • Plaintiff’s Counsel: Taft Stettinius & Hollister LLP
• Case Identification: 1:26-cv-00564, N.D. Ohio, 03/09/2026
• Venue Allegations: Plaintiff alleges venue is proper in the Northern District of Ohio because its principal place of business is in the district, the accused products are imported, marketed, and sold from the district, and a substantial part of the events giving rise to the action occurred there.
• Core Dispute: Plaintiff seeks a declaratory judgment that its ultrasound training simulator products do not infringe five U.S. patents exclusively licensed by the Defendant.
• Technical Context: The technology at issue involves medical training simulators designed to teach practitioners the cognitive and psychomotor skills required for performing ultrasound examinations and procedures.
• Key Procedural History: The action was initiated by Surgical Science North America in response to cease and desist letters sent by SonoSim's counsel to Surgical Science's parent company. The letters accused various Surgical Science products of infringing the patents-in-suit and threatened litigation, thereby creating, in the Plaintiff’s view, an actual and immediate controversy warranting judicial resolution.

Case Timeline

Date	Event
2004-11-30	Earliest Priority Date for '983 and '404 Patents
2012-10-30	U.S. Patent No. 8,297,983 Issues
2012-12-18	Earliest Priority Date for '721 and '709 Patents
2013-07-09	U.S. Patent No. 8,480,404 Issues
2015-09-29	Earliest Priority Date for '944 Patent
2018-01-16	U.S. Patent No. 9,870,721 Issues
2021-09-14	U.S. Patent No. 11,120,709 Issues
2023-04-18	U.S. Patent No. 11,627,944 Issues
2026-01-15	First Notice Letter sent by Defendant's counsel
2026-01-23	Plaintiff's counsel responds to notice letter
2026-01-30	Second Notice Letter sent by Defendant's counsel
2026-03-09	Complaint for Declaratory Judgment Filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 8,297,983 - "Multimodal Ultrasound Training System"

• Patent Identification: U.S. Patent No. 8,297,983, titled "Multimodal Ultrasound Training System," issued October 30, 2012.

The Invention Explained

• Problem Addressed: The patent background describes the high cost and logistical barriers to traditional ultrasound training, which has limited widespread adoption despite the technology's clinical benefits. Effective training requires integrating cognitive skills (image interpretation) and psychomotor skills (probe handling) and exposure to a wide variety of patient pathologies, which is difficult to achieve efficiently ('983 Patent, col. 2:5-35).
• The Patented Solution: The invention claims a comprehensive, low-cost, and scalable ultrasound training system designed for personal computers. The system integrates multiple components: a "data capture module" for acquiring real patient data at the bedside, a "digital asset management module" for storing and organizing this data, "didactic content" for instruction, an "integration layer" to combine the content and hands-on simulation, and an "internet-based portal" with an "online storefront" for distributing the training modules to end-users via a "software client" and "peripheral probe" ('983 Patent, abstract; '983 Patent, col. 3:10-col. 4:33).
• Technical Importance: The described system architecture was aimed at making sophisticated ultrasound simulation training more accessible and affordable by moving it from dedicated, high-cost simulation centers to widely available personal computers ('983 Patent, col. 2:50-68).

Key Claims at a Glance

The complaint references independent claims 1 and 2 (Compl. ¶24). Claim 1 includes the following essential elements:

• A "data capture module" with software on a laptop for synchronous, real-time capture of ultrasound images and other data at a patient's bedside, which are organized into a case volume.
• A "digital asset management module" comprising a server and databases for storing and managing case volumes from the capture module.
• A "validation module" for managing the assessment and quality control of case volumes.
• "Didactic content" such as a curriculum and questions.
• A "media asset production module" for creating media elements for the didactic content.
• An "integration layer" that combines validated case volumes and media elements into an integrated case volume.
• An "internet-based portal" comprising an "online storefront" for user access to the integrated case volume.
• A "software client" for managing the download of the integrated case volume.
• A "peripheral probe" (e.g., a mock ultrasound probe) for navigating the downloaded case volume.

U.S. Patent No. 8,480,404 - "Multimodal Ultrasound Training System"

• Patent Identification: U.S. Patent No. 8,480,404, titled "Multimodal Ultrasound Training System," issued July 9, 2013.

The Invention Explained

• Problem Addressed: The patent identifies the shortcomings of traditional "see one, do one, teach one" procedural training, which can pose risks to patients, and notes that existing virtual reality (VR) training systems are often cost-prohibitive for widespread use ('404 Patent, col. 1:26-51).
• The Patented Solution: The invention describes a multimodal medical training system that simulates both ultrasound imaging and ultrasound-guided procedures. It does so by integrating a "graphical interface" that displays both "actual images" previously recorded from a live subject and "simulated images," which are described as "modified actual images" (e.g., with a muscle layer removed). A user manipulates a "user input device" (motion sensor) that controls a virtual probe model, and the system is configured to provide "system feedback" to simulate the procedure ('404 Patent, abstract; '404 Patent, col. 2:53-col. 3:2).
• Technical Importance: This technology aims to provide a more realistic simulation of ultrasound-guided procedures by combining real-patient imagery with interactive, modifiable virtual elements and system feedback.

Key Claims at a Glance

The complaint references independent claims 1, 3, and 17 (Compl. ¶102). Claim 1 includes the following essential elements:

• A "control device".
• A "graphical interface" displaying a digital video and a virtual anatomical/probe model.
• The digital video comprises "actual images" (from a live subject, including a muscle layer) and "simulated images," where the simulated images are "modified actual images" from which the muscle layer depiction is removed.
• The actual and simulated images are correlated to the position of the probe model.
• A "user input device" with a motion sensor to detect position and direction.
• The system is configured to simulate ultrasound imaging and ultrasound-guided medical procedures through "system feedback".

U.S. Patent No. 9,870,721 - "System and Method for Teaching Basic Ultrasound Skills"

• Patent Identification: U.S. Patent No. 9,870,721, "System and Method for Teaching Basic Ultrasound Skills," issued January 16, 2018.
• Technology Synopsis: The patent describes a system for teaching foundational ultrasound skills. The system uses a physical apparatus containing a basic geometric shape, which a trainee scans with a physical input device. A multi-window display shows menus for selecting virtual shapes and probes, a 3D view of the virtual probe interacting with the virtual shape, and the resulting 2D ultrasound "slice," thereby training hand-eye coordination ('721 Patent, abstract).
• Asserted Claims: Independent claims 1 and 10 (Compl. ¶248).
• Accused Features: The complaint alleges the Accused Products do not include the claimed multi-window display that shows, during operation, a menu of virtual basic shapes, a menu of virtual transducer probes, a virtual ultrasound probe in a simulated environment, and a 2D image of an ultrasound slice all in separate, designated windows or portions (Compl. ¶248; Compl. ¶¶251-252; Compl. ¶¶255-256).

U.S. Patent No. 11,120,709 - "System and Method for Teaching Basic Ultrasound Skills"

• Patent Identification: U.S. Patent No. 11,120,709, "System and Method for Teaching Basic Ultrasound Skills," issued September 14, 2021.
• Technology Synopsis: This patent is directed to a system for teaching basic ultrasound skills. The claimed invention includes an input device in the form of a "transducer frame" that comprises a motion-sensing device, specifically an "accelerometer", to control a virtual ultrasound probe. A multi-window display is used to show menus of basic shapes and probes, the virtual probe, and the resulting 2D ultrasound slice ('709 Patent, abstract).
• Asserted Claims: Independent claims 1 and 14 (Compl. ¶293).
• Accused Features: The complaint alleges that the Accused Products do not include an input device comprising a motion sensing device that contains an "accelerometer" as required by the claims (Compl. ¶293; Compl. ¶¶296-297; Compl. ¶¶300-301).

U.S. Patent No. 11,627,944 - "Ultrasound Case Builder System and Method"

• Patent Identification: U.S. Patent No. 11,627,944, "Ultrasound Case Builder System and Method," issued April 18, 2023.
• Technology Synopsis: The patent describes a system for creating customized ultrasound simulation cases. The system provides a graphical user interface to display a "virtual body" with predetermined anatomical regions. A user can then access a "volume library" of real-patient volumetric data sets and assign different data sets (including those from different patients) to different anatomical regions of the virtual body to build a custom simulation case ('944 Patent, abstract).
• Asserted Claims: Independent claims 1 and 11 (Compl. ¶350).
• Accused Features: The complaint alleges the Accused Products do not include a processor configured to select and assign volumetric data sets from a library to discrete anatomical regions on a virtual body (Compl. ¶¶353-354; Compl. ¶363-364). It also alleges the products lack the claimed "visual tools configured to allow for... alter[ing] a geometry of the virtual body" (Compl. ¶350; Compl. ¶¶359-360).

III. The Accused Instrumentality

Product Identification

The complaint identifies the "Accused Products" as Surgical Science-branded ultrasound training systems, including Body Works Eve, Heartworks, Babyworks, ScanTrainer (including Compact and Cloud versions), Needle Trainer, and Ultrasound Mentor modules (Compl. ¶¶14-19).

Functionality and Market Context

• The Accused Products are described as ultrasound simulators used for medical training (Compl. ¶10). Based on the non-infringement allegations, their functionality involves using pre-existing ultrasound image volumes that are "captured from ultrasound machines, where the volumes of ultrasound images are exported for later possible use" in the simulators (Compl. ¶33; Compl. ¶45; Compl. ¶57). This suggests a workflow based on post-processing and loading of curated datasets, rather than real-time bedside capture (Compl. ¶¶31-32).
• The complaint alleges that the products do not have integrated e-commerce "online storefronts" for purchasing and downloading content (Compl. ¶¶37-42). It also makes specific allegations that certain products use computer-generated simulated images rather than modifying actual patient images (Compl. ¶¶217-218), and that others lack specific hardware like an accelerometer (Compl. ¶¶296-297).
• The complaint notes that the Accused Products are used in educational and medical programs, such as at the Cleveland Clinic Akron General Emergency Medicine Ultrasound fellowship (Compl. ¶8).

No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

The following tables summarize the Plaintiff's key non-infringement positions as articulated in the declaratory judgment complaint.

'983 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Plaintiff's Non-Infringement Position	Complaint Citation	Patent Citation
(a) a data capture module... comprising software loaded on a laptop computer... to provide synchronous real-time capture of ultrasound images... at a patient's bedside...	Plaintiff alleges the Accused Products do not include a data capture module for real-time, bedside capture. Instead, they use ultrasound images that are pre-captured from ultrasound machines and exported for later use in the simulators (Compl. ¶33; Compl. ¶45).	¶¶31-36; ¶¶43-48	col. 3:15-38
(g) an internet-based portal, the internet-based portal comprising an online storefront providing user access to the integrated case volume and software technology for navigation of the integrated case volume...	Plaintiff alleges the Accused Products do not include an "online storefront" with the e-commerce capabilities described in the patent, such as browsing a catalog, securely processing purchases, creating user accounts, or digitally downloading content (Compl. ¶39).	¶¶37-42; ¶¶49-54	col. 4:1-5; col. 9:12-30

'404 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Plaintiff's Non-Infringement Position	Complaint Citation	Patent Citation
...the digital video comprises actual images... as well as simulated images, the simulated images being modified actual images, the simulated images removing the depiction of the muscle layer from the actual images...	Plaintiff alleges that certain Accused Products do not feature simulated images that are created by modifying actual images and removing a tissue layer. For example, it alleges the Ultrasound Mentor's simulated images are computer-generated (Compl. ¶217).	¶¶126-127; ¶¶168-169; ¶¶216-218	col. 2:58-65
...wherein the system is configured to simulate ultrasound imaging and ultrasound-guided medical procedures through system feedback.	Plaintiff alleges that certain Accused Products, such as ScanTrainer and HeartWorks, are not configured to simulate ultrasound-guided medical procedures through system feedback (Compl. ¶149; Compl. ¶171).	¶¶148-151; ¶¶170-171; ¶¶174-175	col. 3:1-2

• Identified Points of Contention:
  • Scope Questions: A primary point of contention will likely be the construction of key claim terms. For the '983 Patent, the definition of "online storefront" will be critical; the complaint suggests this requires specific e-commerce functionalities detailed in the specification (Compl. ¶¶27-30), whereas SonoSim may argue for a broader interpretation. For the '404 Patent, the meaning of "simulated images being modified actual images" raises the question of whether a purely synthetic image that is correlated to an actual one meets the limitation, or if direct digital manipulation of the source image data is required.
  • Technical Questions: The case will also present factual questions about the operation of the Accused Products. For the '983 Patent, a key question is whether the Accused Products' use of pre-exported data is fundamentally different from the claimed "synchronous real-time capture... at a patient's bedside" (Compl. ¶24). For the '404 Patent, a technical question is what specific functionality constitutes "system feedback" for simulating guided procedures, and whether any feedback mechanisms in the Accused Products meet that claimed function (Compl. ¶102).

V. Key Claim Terms for Construction

• The Term: "online storefront" (from '983 Patent, claim 1)

• Context and Importance: This term is central to the non-infringement argument for the '983 patent. Plaintiff’s position is that its products lack this feature entirely (Compl. ¶¶37-42). The case may turn on whether any web portal or content delivery system associated with the Accused Products can be construed as an "online storefront."

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The claim language itself describes the portal as "providing user access to the integrated case volume" ('983 Patent, claim 1(g)). A party could argue that any internet portal that provides users with access to training content could satisfy this language, regardless of payment or e-commerce functionality.
  • Evidence for a Narrower Interpretation: The specification explicitly equates the "internet-based portal" with an "online store" and describes it as having "the basic capabilities found in modern e-commerce systems," including "(1) the ability to browse an extensive online catalog; (2) the ability to process purchases and transactions securely; (3) the ability to create user accounts...; and (4) the ability to download content digitally" ('983 Patent, col. 9:45-54). The complaint relies heavily on this detailed description to support a narrower construction that requires transactional e-commerce features (Compl. ¶¶29-30).

• The Term: "simulated images being modified actual images" (from '404 Patent, claim 1)

• Context and Importance: This term is critical to the non-infringement argument for the '404 patent, as Plaintiff alleges that at least some of its products use purely computer-generated images, not modified ones (Compl. ¶217). The dispute will likely focus on the required relationship between the "actual" and "simulated" images.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: A party might argue that a simulated image that is spatially correlated with an actual image and represents a conceptual modification (e.g., showing an idealized version of the anatomy visible in the actual scan) meets the claim's intent.
  • Evidence for a Narrower Interpretation: The claim language specifies that the "simulated images remov[e] the depiction of the muscle layer from the actual images" ('404 Patent, claim 1). This phrasing suggests a direct, subtractive digital process applied to the actual images, rather than the creation of a separate, de novo computer-generated image that happens to correspond to the same anatomy.

VI. Other Allegations

• Indirect Infringement: The complaint affirmatively denies any indirect infringement of the patents-in-suit. Plaintiff asserts that it does not induce infringement because there is no underlying direct infringement by any party and because it has not acted with the specific intent required for inducement (Compl. ¶96; Compl. ¶242; Compl. ¶287; Compl. ¶344; Compl. ¶411). Similarly, it denies contributory infringement, arguing there is no direct infringement and that it has not sold any products "knowing the same to be especially made or especially adapted for use in an infringement" (Compl. ¶97; Compl. ¶243; Compl. ¶288; Compl. ¶345; Compl. ¶412).

VII. Analyst’s Conclusion: Key Questions for the Case

This declaratory judgment action appears to center on several fundamental disputes regarding claim scope and the technical operation of the accused products. The key questions for the court will likely be:

1. A core issue will be one of definitional scope: Will key terms such as "online storefront" ('983 patent) be construed narrowly to require the specific e-commerce functionalities detailed in the specification, as Plaintiff argues, or will they be given a broader meaning that could potentially read on the Accused Products' existing content access methods?

2. A second key issue will be one of architectural mismatch: Do the Accused Products, which allegedly operate using pre-recorded and exported ultrasound data, fall outside the scope of patents like the '983 patent, which claims a system centered on "synchronous real-time capture" of data at a patient's bedside?

3. A final question will be one of technical implementation: For patents like the '404 patent, does the creation of purely computer-generated simulated images constitute the claimed "modified actual images"? This raises a fundamental question of whether the accused technology achieves a similar result through a technically distinct and non-infringing method.