Prior art

Prior Art Analysis for US Patent 12375890

This analysis identifies and examines the prior art cited in US Patent 12,375,890, titled "System and method for managing access to a push-to-talk-over-cellular communication network." The information is based on the authoritative patent text retrieved on May 6, 2026. The analysis focuses on determining which claims of the patent are potentially anticipated by each prior art reference under 35 U.S.C. § 102.

The core invention of US Patent 12,375,890 revolves around a system for temporarily granting non-subscriber devices access to a Push-to-Talk-over-Cellular (POC) talkgroup. This is initiated by a subscriber device sending non-subscriber contact information to a control device, which then transmits a communication to the non-subscriber device, often including a link to download the necessary software and configuration information. Access for the non-subscriber is typically granted for a predetermined period and can be automatically revoked.

Cited Prior Art References and Potential Anticipation

The following table details the prior art references cited in the patent and an analysis of their potential to anticipate the claims of US 12,375,890.

Full Citation	Publication/Filing Date	Brief Description	Potential Anticipation of Claims
US20050233776A1 "Method and apparatus for dynamic group address creation" Assignee: Allen Andrew M	Publication Date: 2005-10-20	Describes a method for dynamically creating a group address for a communication group, where a user can invite other users to join a group session.	Claims 1, 8: This reference appears to disclose the concept of a user inviting others to a communication group. However, it may not explicitly detail the "non-subscriber" aspect or the transmission of a link to download a specific POC software application as required by the independent claims. The level of anticipation would depend on whether the "invitation" in the prior art inherently includes providing the means to communicate, which could be argued to be equivalent to the claimed "link."
US20060252442A1 "Method for establishing a PoC connection in a terminal device with a touch-screen display, an application used in the method and a terminal device" Assignee: Nokia Corporation	Publication Date: 2006-11-09	Focuses on the user interface for establishing a Push-to-Talk over Cellular (PoC) connection on a touch-screen device, including selecting participants for a group call.	Claims 1, 3, 8, 10: This reference discloses the establishment of PoC connections and the selection of participants, which aligns with the initial steps of the claimed methods. However, a detailed review would be necessary to determine if it describes sending an invitation to a non-subscriber device that includes a link to download the necessary application, a key element of the independent claims of US 12,375,890.
US7499720B2 "System and method for initiating push-to-talk sessions between outside services and user equipment" Assignee: Sonim Technologies, Inc.	Publication Date: 2009-03-03	Discloses a system for initiating a push-to-talk (PTT) session that can include participants from different PTT services or even non-PTT users via a gateway.	Claims 1, 6, 7, 8: This patent's focus on interoperability between different services and including "outside" users is highly relevant. It potentially anticipates the core concept of granting access to external devices. The key determination would be whether its method of inclusion for "outside services" is equivalent to sending a direct communication with a software download link to a non-subscriber device as claimed.
US20180278718A1 "Method and apparatus for a cloud-based broadband push-to-talk configuration portal" Assignee: Motorola Solutions, Inc	Publication Date: 2018-09-27	Describes a cloud-based portal for configuring push-to-talk (PTT) services, which could include adding and managing users and talkgroups.	Claims 1, 3, 4, 8, 10, 11: This reference's disclosure of a centralized, cloud-based system for managing PTT configurations is conceptually similar to the "control device" in the '890 patent. The anticipation would depend on whether this portal's functionality includes the specific workflow of a subscriber inviting a non-subscriber and the automated sending of a software link and temporary access credentials.
US10681506B1 "System and method for push-to-talk over cellular integration with software defined radio" Assignee: Tango Tango, Inc.	Publication Date: 2020-06-09	Details a system for integrating Push-to-Talk over Cellular (POC) with traditional Land Mobile Radio (LMR) systems, allowing users on both networks to communicate.	Claims 1, 8: While this patent deals with POC technology and interconnectivity, its primary focus is on bridging two different types of communication networks (POC and LMR). It is less likely to anticipate the specific claims related to temporarily provisioning a non-subscriber cellular device by sending a software link, which is the central novelty of the '890 patent.

Summary of Anticipation Analysis

While several prior art references disclose elements of managing Push-to-Talk over Cellular (POC) talkgroups and inviting users, the key inventive concept of US Patent 12,375,890 appears to be the specific method of granting temporary access to a non-subscriber device. This is achieved by having a subscribed user initiate a process that causes a control server to send a communication to the non-subscriber, which includes a link to download the necessary software application, thereby enabling ad-hoc and time-limited inclusion of external participants.

The strongest potential for anticipation comes from US7499720B2 and US20180278718A1. The '720 patent discusses including "outside services," and the '718 patent describes a cloud-based configuration portal. A thorough analysis would require a detailed comparison of the specific mechanisms disclosed in these patents against the limitations of the independent claims (1 and 8) of US 12,375,890. Specifically, it would need to be determined if these prior art references teach the step of "transmitting, from the control device to the first non-subscriber device, a first communication including a link to download a POC software application." If this specific step is not present in the prior art, an argument for novelty under 35 U.S.C. § 102 would likely be sustained. The dependent claims, which add limitations such as automatic revocation of access after a predetermined time (claims 2, 4, 9, 11), further narrow the scope and may not be anticipated even if the independent claims are.