Interstate Patents LLC v. Penske Automotive Group Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Interstate Patents, LLC (Texas)
  • Defendant: Penske Automotive Group, Inc. (Delaware); Penske Logistics LLC (Delaware); Penske Truck Leasing Co., L.P. (Delaware)
  • Plaintiff's Counsel: Antonelli, Harrington & Thompson LLP
• Case Identification: 9:26-cv-00129, E.D. Tex., 02/19/2026
• Venue Allegations: Plaintiff alleges venue is proper because Defendants have committed acts of patent infringement in the district and maintain regular and established places of business within the district.
• Core Dispute: Plaintiff alleges that Defendants' fleet management and telematics solutions, which are provided by Zonar Systems, Inc., infringe seven U.S. patents related to wireless communications, location-based diagnostics, and emergency call handling.
• Technical Context: The technology at issue falls within the vehicle telematics sector, which involves systems for monitoring vehicle location, performance, and driver behavior, representing a critical component of modern logistics and fleet management operations.
• Key Procedural History: The complaint does not reference any prior litigation, Inter Partes Review (IPR) proceedings, or licensing history related to the asserted patents.

Case Timeline

Date	Event
2004-02-06	U.S. Patent No. 7,251,535 Priority Date
2004-02-12	U.S. Patent No. 7,460,737 Priority Date
2004-03-26	U.S. Patent No. 7,388,848 Priority Date
2005-02-25	U.S. Patent No. 8,605,864 Priority Date
2005-11-15	U.S. Patent No. 7,639,943 Priority Date
2006-04-19	U.S. Reissued Patent No. RE44,797 Priority Date
2006-11-20	U.S. Patent No. 7,557,689 Priority Date
2007-07-31	U.S. Patent No. 7,251,535 Issued
2008-06-17	U.S. Patent No. 7,388,848 Issued
2008-12-02	U.S. Patent No. 7,460,737 Issued
2009-07-07	U.S. Patent No. 7,557,689 Issued
2009-12-29	U.S. Patent No. 7,639,943 Issued
2013-12-10	U.S. Patent No. 8,605,864 Issued
2014-03-11	U.S. Reissued Patent No. RE44,797 Issued
2026-02-19	Complaint Filing Date

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

U.S. Reissued Patent No. RE44,797 - "Apparatus, Method and Computer Program Product Providing User Equipment Operation by Considering Scheduling Information With Regard to the Use of Relative Grants"

• Issued: March 11, 2014

The Invention Explained

• Problem Addressed: In certain wireless communication protocols (e.g., 3G/HSUPA), a mobile device or "user equipment" (UE) must receive permission, known as a "grant," from a base station to transmit data. The patent addresses a scenario where the network may inefficiently adjust these grants based on prior transmissions that contained only scheduling information and no actual user data RE44,797, abstract
• The Patented Solution: The invention provides a method for a user equipment to manage its uplink transmissions more efficiently RE44,797, abstract The user equipment identifies the contents of a message it recently sent and, based on those contents, determines whether to disregard a "serving relative grant" for a subsequent transmission RE44,797, claim 53 Specifically, the method instructs the user equipment to ignore a relative grant if the previous transmission consisted only of a "scheduling information (SI) event alone" RE44,797, abstract This prevents the base station from making incorrect, incremental power adjustments based on a transmission that lacked substantive data.
• Technical Importance: This approach is intended to enhance the efficiency and stability of uplink scheduling in wireless networks by preventing erroneous adjustments to a user's transmission power, thereby optimizing the use of shared network resources.

Key Claims at a Glance

• The complaint asserts independent claim 53 Compl. ¶23
• The essential elements of independent claim 53 are:
  • A method, comprising:
  • identifying, by a processing device in user equipment, contents of a message transmitted in a first time interval by the user equipment to a base station; and
  • disregarding, by the processing device, a serving relative grant for a transmission during a second time interval based on the contents of the message.

U.S. Patent No. 8,605,864 - "Systems and Methods for Providing 9-1-1 Services to Nomadic Internet Telephony Callers"

• Issued: December 10, 2013

The Invention Explained

• Problem Addressed: The patent addresses the challenge of providing emergency 9-1-1 services for "nomadic" internet telephony (VoIP) callers 8,605,864, abstract Unlike traditional landlines, VoIP devices are not tied to a fixed physical address, which complicates the process of automatically routing an emergency call to the correct local Public Safety Answering Point (PSAP) 8,605,864, col. 2:37-44
• The Patented Solution: The patent discloses a server-based method for handling such calls 8,605,864, abstract When a server receives information indicative of an emergency call, it first determines that the calling device is not associated with a fixed geographic location 8,605,864, claim 1 In response, instead of attempting to automatically route the call, it forwards the call to a different computer device, such as an operator services interface, for the purpose of identifying the appropriate emergency service provider, which may involve manual intervention to determine the caller's location 8,605,864, claim 1 8,605,864, col. 6:33-40
• Technical Importance: The invention provides a critical fallback mechanism for routing emergency calls from nomadic devices, ensuring that a human operator can intervene when automated location detection and routing fail.

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶33
• The essential elements of independent claim 1 are:
  • A method, comprising:
  • receiving, at a server device, information indicative of an emergency call initiated from a particular device;
  • determining, at the server device, that the particular device is not associated with a fixed geographic location; and
  • in response to the determining, forwarding the emergency call to a computer device in order to identify an emergency service provider for the emergency call.

U.S. Patent No. 7,639,943 - "Computer-Implemented System and Method for Automated Image Uploading and Sharing From Camera-Enabled Mobile Devices"

• Issued: December 29, 2009 Compl. ¶39
• Technology Synopsis: The patent describes a method for a camera-enabled mobile device to automatically capture a plurality of images without user action for each capture 7,639,943, abstract The capture is performed periodically under the control of a program downloaded by a user and the images are automatically uploaded to a network server 7,639,943, claim 1
• Asserted Claims: At least Claim 1 Compl. ¶42
• Accused Features: The complaint alleges that the Zonar Coach and Zonar Dashcam products, which automatically capture and upload footage of driving events to a cloud-based portal, infringe the '943 Patent Compl. ¶41 Compl. ¶43 Compl. Ex. 3, p. 2

U.S. Patent No. 7,557,689 - "Alerting Method, Apparatus, Server, and System"

• Issued: July 7, 2009 Compl. ¶48
• Technology Synopsis: The patent discloses a method for an alert system where an alert server receives a request from an authenticated issuer, notifies other alert servers, determines which subscribers are to receive the alert, and sends alert messages only to those specific subscribers 7,557,689, abstract The server maintains a permanent secure connection with the subscribers receiving alerts 7,557,689, claim 20
• Asserted Claims: At least Claim 20 Compl. ¶51
• Accused Features: The complaint accuses the Zonar ZAlerts and Zonar Ignition/Ground Traffic Control products Compl. ¶50 These systems are alleged to generate notifications for specific events and send them to a configurable list of contacts, who are subscribers to the service Compl. Ex. 4, p. 2

U.S. Patent No. 7,460,737 - "Method and Apparatus for Photograph Finding"

• Issued: December 2, 2008 Compl. ¶57
• Technology Synopsis: The patent describes a computer-implemented method for distributing and searching for image data 7,460,737, abstract The method involves collecting images, automatically analyzing them to assign alphanumeric descriptions of objects appearing in them, storing the images and descriptions in a database, and processing search requests based on alphanumeric criteria 7,460,737, claim 1
• Asserted Claims: At least Claim 1 Compl. ¶60
• Accused Features: The infringement allegation targets the Zonar Coach product, which allegedly collects video, analyzes it to identify and describe events (e.g., "tailgating," "speeding"), and allows users to search and review the event-based footage Compl. ¶59 Compl. ¶61 Compl. Ex. 5, p. 5

U.S. Patent No. 7,388,848 - "Method and Apparatus for Transport Format Signaling With HARQ"

• Issued: June 17, 2008 Compl. ¶66
• Technology Synopsis: The patent discloses a signaling method for a communication link using a Hybrid Automatic Repeat Request (HARQ) protocol 7,388,848, abstract A "predetermined bit pattern" in a transmission indicates whether the current control information is sufficient for decoding a transport channel, or if control information from an earlier transmission must also be used 7,388,848, claim 1
• Asserted Claims: At least Claim 1 Compl. ¶69
• Accused Features: The complaint targets Zonar telematics control units that use 4G LTE technology, which employs standardized signaling protocols for managing data transmissions and retransmissions Compl. ¶68 Compl. ¶70 Compl. Ex. 6, p. 4

U.S. Patent No. 7,251,535 - "Location Based Diagnostics Method and Apparatus"

• Issued: July 31, 2007 Compl. ¶76
• Technology Synopsis: The patent describes a method for performing diagnostic processes on an enterprise operation 7,251,535, abstract A summary process is automatically initiated when a predefined "triggering relationship" between a user and the operation occurs, such as a user being in a specific location relative to a piece of equipment 7,251,535, claim 1
• Asserted Claims: At least Claim 1 Compl. ¶79
• Accused Features: The accused products are the Zonar Ignition/Ground Traffic Control products Compl. ¶78 The complaint alleges these products use location-based triggers, such as geofences, to automatically initiate processes like generating alerts or reports when a vehicle enters or exits a defined area Compl. Ex. 7, p. 3 Compl. Ex. 7, p. 5

III. The Accused Instrumentality

Product Identification

• The complaint identifies the accused instrumentalities as a suite of fleet management and tracking solutions provided by Zonar Systems, Inc., and used or distributed by Penske Compl. ¶¶15-17 Specific products named include the Zonar Ignition/Ground Traffic Control platform, Zonar V4 Telematics Control Unit (TCU), Zonar Coach driver coaching platform, Zonar ZAlerts, and Zonar Dashcam Compl. ¶17

Functionality and Market Context

• The accused products are described as systems that provide telematics and fleet management services Compl. ¶17 The complaint alleges that Penske advertises that its vehicles are equipped with Zonar TCUs that pull diagnostic data directly from the vehicle for maintenance and roadside assistance purposes Compl. ¶16 The functionality is alleged to include tracking vehicle locations, analyzing maintenance needs and driver behavior, managing real-time alerts, and monitoring driver safety via integrated dashcam video Compl. ¶18 The complaint presents an image of the Zonar V4 TCU, an exemplary accused product that provides telematics control Compl. Ex. 1, p. 2

IV. Analysis of Infringement Allegations

RE44,797 Infringement Allegations

Claim Element (from Independent Claim 53)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method, comprising: identifying, by a processing device in user equipment, contents of a message transmitted in a first time interval by the user equipment to a base station;	The Zonar V4 TCU, which incorporates a u-blox TOBY-L200 cellular module, is alleged to operate on 3G networks and transmit messages, including scheduling information, to a base station.	¶22; ¶25; Ex. 1, p. 4	RE44,797, col. 3:4-10
and disregarding, by the processing device, a serving relative grant for a transmission during a second time interval based on the contents of the message.	The complaint alleges that the accused device, by complying with 3GPP standards, disregards a relative grant if the previous transmission contained only scheduling information without data. This decision is alleged to be based on the contents of the prior message.	¶23; Ex. 1, p. 7	RE44,797, abstract

8,605,864 Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method, comprising: receiving, at a server device, information indicative of an emergency call initiated from a particular device;	The Zonar system allegedly includes an in-vehicle panic button that, when pressed by a driver, generates a "ZAlert" notification that is sent to a server (the Ground Traffic Control platform). The complaint alleges this alert is "information indicative of an emergency call."	¶33; Ex. 2, p. 4	8,605,864, col. 3:1-4
determining, at the server device, that the particular device is not associated with a fixed geographic location;	The accused products are installed in vehicles, which are mobile and therefore not associated with a fixed geographic location. The server is aware of the mobile nature of the asset.	¶33; Ex. 2, p. 5	8,605,864, col. 4:40-44
and in response to the determining, forwarding the emergency call to a computer device in order to identify an emergency service provider for the emergency call.	The ZAlert is allegedly forwarded via email or web interface to "designated personnel" (e.g., a fleet manager). The complaint's theory is that these personnel and their computer devices fulfill the role of identifying the appropriate emergency service provider. The complaint includes an example of a ZAlert email notification sent to a designated recipient (Compl. Ex. 2, p. 4).	¶33; Ex. 2, p. 4	8,605,864, col. 3:5-13

Identified Points of Contention

• For the '797 Patent, a potential point of contention is whether the accused device's decision to ignore a grant is "based on the contents of the message" as claimed. An issue for claim construction may be whether this requires analysis of the specific data within the scheduling information message, or if it is met by a decision based on the type of the prior transmission (i.e., a transmission containing scheduling information alone).
• For the '864 Patent, a primary question will concern the scope of the term "emergency call." The dispute may center on whether a proprietary "ZAlert" sent to a fleet manager's dashboard can be considered an "emergency call" within the context of a patent titled and focused on providing public "9-1-1 Services." A related question is whether forwarding the alert to "designated personnel" for internal response constitutes forwarding to a device "in order to identify an emergency service provider."

V. Key Claim Terms for Construction

For U.S. Reissued Patent No. RE44,797

• The Term: "based on the contents of the message" (from claim 53)
• Context and Importance: The infringement theory relies on the accused device disregarding a grant because the previous transmission contained only scheduling information. The construction of this term will be critical to determining if the decision-making process of the accused device falls within the claim scope. Practitioners may focus on this term because the accused device's action is triggered by the absence of scheduled data in the prior transmission, raising the question of whether this is a decision "based on the contents" of the message that was sent.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent's abstract states the invention involves "not using the SRG if it is determined that there was a scheduling information (SI) event alone," which could suggest that the "contents" can refer to the overall nature or type of the message RE44,797, abstract
  • Evidence for a Narrower Interpretation: The claim language "contents of the message" could be argued to require an examination of the specific data bits or fields within the transmitted message itself, rather than a determination based on what was not transmitted (i.e., user data).

For U.S. Patent No. 8,605,864

• The Term: "information indicative of an emergency call" (from claim 1)
• Context and Importance: This term is central to the dispute, as the accused functionality is a proprietary fleet alert system, whereas the patent is titled and described in the context of public 9-1-1 services. The case may turn on whether a "panic button" alert to a fleet manager is legally equivalent to a 9-1-1 call.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification may use general language describing a user in need of assistance, which could support including a vehicle panic button alert within the term's scope. The claim itself uses the general term "emergency call" rather than explicitly limiting it to "9-1-1 call."
  • Evidence for a Narrower Interpretation: The patent's title, "Systems and Methods for Providing 9-1-1 Services...", and repeated references to PSAPs and operator services for emergency dispatch create strong intrinsic evidence that "emergency call" is intended to mean a call directed toward the public emergency response system 8,605,864, title 8,605,864, abstract

VI. Other Allegations

Indirect Infringement

• The complaint alleges that Penske induced infringement by "advising or directing customers, end users, and others...to use the accused products in an infringing manner" and by "distributing instructions that guide users" to do so Compl. ¶88 It also alleges inducement by importing, selling, or offering to sell the accused products Compl. ¶91 Contributory infringement is alleged based on the accused products having "special features" that are not "staple articles of commerce suitable for substantial non-infringing use" Compl. ¶¶103-105

Willful Infringement

• The complaint alleges that Penske had knowledge of the asserted patents at least as of the date of the complaint's filing Compl. ¶107 It further alleges willful blindness based on a purported "policy or practice of not reviewing the patents of others" Compl. ¶109

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

• A central issue of definitional scope will likely arise for several patents: Can terms rooted in specific technical or regulatory contexts (e.g., "emergency call" for 9-1-1 services in the '864 patent; "photograph finding" in the '737 patent) be construed to cover analogous functions in the general-purpose field of vehicle telematics (e.g., a "panic alert" to a fleet manager; video event analysis)?
• A key technical question for the '797 patent will be one of causation: Does the accused device disregard a relative grant because of the "contents" of the prior scheduling information, as Claim 53 requires, or does it do so based on the more general condition that the prior transmission slot lacked user data, a distinction that may prove critical during claim construction?
• An overarching question will be one of technological application: The case presents a conflict between patents directed at specific solutions in mobile telephony and media management, and accused systems that provide broad, integrated telematics services. The court will be asked to determine whether the implementation of standardized or common-sense features in a complex telematics platform constitutes infringement of these more narrowly-focused patents.