4:26-cv-03001
Portus Singapore Pte Ltd v. Adi Global Distribution Inc
I. Executive Summary and Procedural Information
- Parties & Counsel:
- Plaintiff: Portus Singapore Pte Ltd (Singapore) and Portus Pty Ltd (Australia)
- Defendant: ADI Global Distribution Inc. (Delaware)
- Plaintiff's Counsel: Ramey LLP
- Case Identification: 4:26-cv-03001, S.D. Tex., 07/22/2026
- Venue Allegations: Plaintiff alleges venue is proper in the Southern District of Texas because Defendant has a regular and established place of business in the district, has committed acts of infringement in the district, and advertises, markets, and sells the accused products there.
- Core Dispute: Plaintiff alleges that Defendant's Control4 home-automation systems infringe two expired patents related to providing remote access and control of premises-based devices using a web browser and an external network architecture.
- Technical Context: The technology addresses remote monitoring and control of home automation and security systems, aiming to replace prior cumbersome methods with a standardized, platform-independent interface based on internet and web-server technologies.
- Key Procedural History: The asserted patents, which share a common specification, expired in June 2020. The complaint notes that U.S. Patent No. 9,961,097 is a continuation of U.S. Patent No. 8,914,526 and is subject to a terminal disclaimer. Plaintiff identifies itself as a non-practicing entity and notes prior settlement licenses related to its patent portfolio. Defendant ADI Global Distribution Inc. is alleged to be a successor-in-interest to the liabilities of Control4 Corporation and its parent companies.
Case Timeline
| Date | Event |
|---|---|
| 1998-12-17 | Priority Date for '526 and '097 Patents |
| 2014-11-10 | '097 Patent Application Filed |
| 2014-12-16 | '526 Patent Issued |
| 2018-05-01 | '097 Patent Issued |
| 2020-06-07 | '526 and '097 Patents Expired |
| 2024-01-01 | Alleged Acquisition of Control4 Business by Defendant's Parent (approx.) |
| 2026-07-22 | Complaint Filed |
II. Technology and Patent(s)-in-Suit Analysis
U.S. Patent No. 8,914,526 - "Local and Remote Monitoring Using a Standard Web Browser" (Issued Dec. 16, 2014)
The Invention Explained
- Problem Addressed: The patent describes the state of remote premises control in the late 1990s as cumbersome and technically demanding Compl. ¶23 Existing methods relied on non-visual interfaces like telephone keypads, required special knowledge to establish connections, or presupposed that the remote premises had an "always-on" internet connection, which was not typical '526 Patent, col. 1:40-61 Furthermore, on-site surveillance systems were costly and left recorded data vulnerable at the premises '526 Patent, col. 2:3-14
- The Patented Solution: The invention proposes a three-part architecture to solve these issues: (1) a user device with a standard web browser, (2) an external "provider network" (or "extranet"), and (3) a "connection gateway" at the user's premises Compl. ¶26 A user accesses a URL pointing to the provider network, which authenticates the user and then initiates an on-demand connection to the appropriate premises gateway '526 Patent, col. 7:40-51 The gateway, which is connected to local devices, then acts as a web server, delivering control and monitoring information back to the user's browser via the provider network '526 Patent, col. 8:14-22 '526 Patent, FIG. 1 This architecture provides a standardized, secure, and user-friendly interface for remote control without requiring a persistent connection at the premises.
- Technical Importance: The claimed architecture provided a unified, geographically independent interface for both local and remote control that was not dependent on a specific hardware platform, a significant improvement over the fragmented and non-visual methods of the time Compl. ¶32
Key Claims at a Glance
- The complaint asserts independent claim 57 Compl. ¶49
- Claim 57 recites a system for remote access comprising:
- A first network located external to user premises, containing a "first arrangement of processing circuitry."
- A "hardware user-access-browser device" running an access browser.
- A plurality of "second arrangements of processing circuitry," each located within a respective user premises.
- A configuration where user input of a URL causes the first arrangement to determine the authorized premises network from authorization data and initiate the establishment of a temporary network connection between the first network and the determined premises network.
- A web server that serves information obtained from the premises network to the user-access browser.
- A limitation that monitoring or control is possible "only by interaction with information served by" the premises-based processing arrangement.
- The complaint reserves the right to assert additional claims Compl. ¶52
U.S. Patent No. 9,961,097 - "System for Remote Access of a User Premises" (Issued May 1, 2018)
The Invention Explained
- Problem Addressed: As a continuation with a shared specification, the '097 patent addresses the same technical problems as the '526 patent Compl. ¶21 Compl. ¶22
- The Patented Solution: The '097 patent describes the same fundamental three-part architecture as the '526 patent Compl. ¶21 Compl. ¶39
- Technical Importance: The invention's importance is identical to that described for the '526 patent Compl. ¶42
Key Claims at a Glance
- The complaint asserts independent claim 1 Compl. ¶55
- Claim 1 recites a system for remote access comprising:
- "first hardware processing circuitry running an access browser module."
- "second hardware processing circuitry" located in a first network external to the user premises.
- A "connection gateway" located in, and part of, the local network of the user premises.
- A sequence initiated by a URL input where the first circuitry accesses the first network and transmits authentication data.
- The second circuitry determines authorization, establishes a new communication session with the gateway, and serves component information to the browser module.
- A constraint that the second hardware processing circuitry obtains the premises information from the gateway "without any direct communicative coupling" between the second circuitry and the networked component Compl. ¶40
- A constraint that the second hardware processing circuitry stores selected information for subsequent review "without requiring the user to provide the authentication data again" Compl. ¶40
- The complaint reserves the right to assert additional claims Compl. ¶58
III. The Accused Instrumentality
Product Identification
The "Accused Instrumentalities" are the Control4 home-automation and remote-access systems Compl. ¶45 This includes Control4 controllers (e.g., C4-EA1), T3 Series touch screens, smart devices like thermostats and lighting, the Control4 mobile application and web portal, and the associated Control4 cloud services Compl. ¶45
Functionality and Market Context
The complaint alleges the Accused Instrumentalities provide remote access, monitoring, and control of devices at a user's premises over the Internet Compl. ¶46 The system is described as using the Control4 mobile app or web portal as the "access browser," a premises-based Control4 controller as the "gateway," and the "Control4 cloud services" as the external network Compl. ¶46 The complaint alleges that Defendant, through its predecessors, supplies this as a single, integrated commercial offering Compl. ¶51
No probative visual evidence provided in complaint.
IV. Analysis of Infringement Allegations
The complaint alleges that the components of the Accused Instrumentalities map to the elements of the asserted claims. The "Control4 cloud services" are alleged to be the claimed "first network external to the premises." The user's device running the "Control4 application and web portal" is alleged to be the "user-access browser." The "Control4 controllers" deployed in users' homes are alleged to be the "premises-based processing arrangements" or "connection gateway" Compl. ¶51 Compl. ¶57
'526 Patent Infringement Allegations
| Claim Element (from Independent Claim 57) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| a first network located external to said user premises, (b) including a first arrangement of processing circuitry... | The Control4 cloud services, which are located external to the user's premises and contain provider network resources Compl. ¶38 Compl. ¶51 | ¶38 | col. 6:13-17 |
| a hardware user access browser device that comprises a processor running an access browser | A user's device (e.g., smartphone) running the Control4 mobile application and web portal Compl. ¶38 Compl. ¶46 | ¶38 | col. 6:7-12 |
| a plurality of second arrangements of processing circuitry each... located in a respective one of the user premises... | The Control4 controllers deployed in users' homes, which form part of each home network Compl. ¶38 Compl. ¶51 | ¶38 | col. 6:40-42 |
| responsive to user-input of a Uniform Resource Locator... said first circuitry arrangement subsequently... determines which one of said user premises networks... and initiates an establishment of a network connection... | User interaction with the Control4 app/portal (the equivalent of URL input) causes the Control4 cloud services to authenticate the user and establish a temporary connection to the user's Control4 controller Compl. ¶34 | ¶34 | col. 7:40-59 |
| using a web server, serves to the user access browser the information from the second circuitry arrangement... | The Control4 cloud services and/or the premises controller serve device information to the Control4 app/portal for user interaction Compl. ¶34 Compl. ¶38 | ¶38 | col. 8:14-22 |
| the at least one of control and monitoring... is possible only by interaction with information served by said one of said second circuitry arrangements. | The complaint alleges that monitoring or control of the premises devices is possible only by interaction with information served by the premises-based processing arrangement (the Control4 controller) Compl. ¶34 | ¶34 | col. 17:53-57 |
'097 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| a first hardware processing circuitry running an access browser module | A user's device running the Control4 mobile application or web portal Compl. ¶44 | ¶44 | col. 6:7-9 |
| a second hardware processing circuitry located in a first network... external to the user premises | The Control4 cloud services, which constitute a provider extranet external to the premises Compl. ¶44 | ¶44 | col. 6:13-17 |
| a connection gateway that is located in, and is part of a local network of, the user premises... | The Control4 controller located in the user's home network Compl. ¶44 | ¶44 | col. 6:40-42 |
| obtains the premises information from the connection gateway without any direct communicative coupling between the second hardware processing circuitry and the networked component | The complaint alleges the Control4 controller acts as a router/hub, mediating all communication between the cloud services and the local devices, thus avoiding direct coupling Compl. ¶40 | ¶40 | col. 8:23-28 |
| stores the selected information in the first network for the user's subsequent review without requiring the user to provide the authentication data again | The complaint alleges this corresponds to the storing of event and surveillance data in a secure repository on the provider network for later viewing within the same browser session without re-authentication Compl. ¶40 | ¶40 | col. 11:1-13 |
- Identified Points of Contention:
- Scope Questions: A central dispute may arise from applying claim terms drafted for the 1998-era internet to modern technology. Questions for the court may include:
- Does the term "hardware user-access-browser device" ('526 patent), defined in the context of a standard web browser, read on a modern smartphone running a proprietary, non-browser "mobile application"?
- Does the term "extranet" ('526 patent), described as a "provider network" or "VPN," encompass today's distributed, multi-tenant "cloud services"?
- Technical Questions: The infringement analysis may turn on specific factual evidence of how the Control4 system operates.
- What evidence supports the allegation that control is possible "only" through the gateway-served information ('526 patent, cl. 57), and that no other control paths (e.g., local APIs, direct cloud-to-device channels) exist?
- Does the Control4 architecture truly function "without any direct communicative coupling" ('097 patent, cl. 1) between the cloud and end devices, or do modern IoT protocols used by the system create a form of coupling not contemplated by the patent?
- Scope Questions: A central dispute may arise from applying claim terms drafted for the 1998-era internet to modern technology. Questions for the court may include:
V. Key Claim Terms for Construction
The Term: "first network located external to said user premises" ('526 patent) / "extranet" ('526 patent) / "second hardware processing circuitry located in a first network" ('097 patent).
Context and Importance: This term's construction is critical for determining whether modern "cloud services" fall within the patent's scope. The complaint equates this with "Control4 cloud services" Compl. ¶46 Practitioners may focus on this term because the defense will likely argue that a modern, distributed, multi-tenant cloud architecture is technologically distinct from the 1998 concept of a more monolithic, privately-managed "extranet" or "Virtual Private Network (VPN)."
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The specification describes the network as a "collection of Internet-accessible resources" '526 Patent, col. 6:18-24, language that could be argued as broad enough to include a modern cloud platform.
- Evidence for a Narrower Interpretation: The patent repeatedly uses the specific terms "extranet" and "Virtual Private Network (VPN)" '526 Patent, abstract '526 Patent, col. 6:25-39 The figures also depict a more centralized "Provider Extranet" '526 Patent, FIG. 1, which could suggest a narrower structure than a distributed cloud.
The Term: "hardware user-access-browser device running an access browser" ('526 patent) / "access browser module" ('097 patent).
Context and Importance: This term's definition will determine if a smartphone running a dedicated mobile app infringes. The patent was written when access was dominated by standard web browsers. The complaint alleges this reads on the "Control4 mobile application and web portal" Compl. ¶46
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The specification notes the device could be a "computer, a mobile phone with display, a Web Phone, or a Personal Digital Assistant" '526 Patent, col. 6:7-9, indicating an intent to cover a range of devices, including mobile ones.
- Evidence for a Narrower Interpretation: The specification consistently links the device to a "client web browser supporting the HyperText Transfer Protocol (HTTP)" '526 Patent, col. 6:10-11 A party could argue that a proprietary mobile application using its own APIs is fundamentally different from a "standard web browser" accessing HTML pages, as was the clear focus of the invention.
VI. Other Allegations
The complaint does not contain specific counts for indirect or willful infringement.
VII. Analyst's Conclusion: Key Questions for the Case
This case presents a classic dispute involving patents from an earlier technological era being asserted against modern systems. The outcome will likely depend on the resolution of three key questions:
A Threshold Legal Question of Timeliness: A critical issue is whether any damages are recoverable. The patents expired on June 7, 2020, while the six-year statutory lookback for damages (35 U.S.C. § 286) from the July 22, 2026 complaint filing date begins on July 22, 2020. As there appears to be no overlap between the damages window and the period when the patents were in force, the claim for damages may be entirely time-barred.
A Core Issue of Definitional Scope: Can claim terms rooted in the 1998 internet architecture-such as "extranet" and "web browser"-be construed to cover modern "cloud services" and proprietary "mobile applications"? The court's interpretation of these key terms will be decisive in determining the scope of the patents and whether they can read on the accused technology.
An Evidentiary Question of Technical Operation: Assuming the claims are not time-barred and are construed broadly enough, a key factual question will be whether the Control4 system's architecture meets specific negative limitations in the claims, such as the "only by interaction" limitation in the '526 patent and the "without any direct communicative coupling" limitation in the '097 patent. This will require detailed technical evidence on the precise data flows within the accused system.