US 10783506

US Patent 10783506, titled "Methods and systems for access control to secure facilities," was issued to TRANSPARENT WIRELESS SYSTEMS LLC. The inventors are Santanu Dutta and Partha Chakravartti. The patent was filed on August 26, 2016, and issued on September 22, 2020.

The abstract describes a method for access control involving a handset sending a signal with user identification to multiple beacon modules using low energy wireless technology. These modules determine a received signal strength indication (RSSI) and an averaged RSSI. The handset's location is then determined based on the pattern of these averaged RSSI values. The beacon modules send the handset's identification and RSSI data to an authentication server, which identifies the nearest user or handset to an access-controlled gate if multiple signals are received. The server then determines if the identified user or handset is authorized and opens the gate if authorization is confirmed.

Independent Claims Overview:

• Independent Claim 1 (Method Claim):
  This claim outlines a method for managing access to a facility with an access-controlled gate, where multiple handsets are sending signals. The method includes:

  1. Each handset transmitting an identification signal to several beacon modules via wireless technology.
  2. Each beacon module receiving these signals, determining multiple received signal strength indication (RSSI) values from each handset, and then averaging these RSSI values.
  3. The beacon modules sending these averaged (or non-averaged) RSSI values and handset/user identification to a central server.
  4. The server determining which user or handset is closest to a predefined "expected location" near the gate, based on the RSSI values, especially when multiple handsets are present.
  5. The server authenticating the nearest handset or user to confirm their authorization to enter the facility.
  6. If authorized, the gate is opened to allow access.
     A key aspect is that the location of the nearest handset or user is determined relative to others, ensuring that the person most likely to be in the expected location is granted access.

• Independent Claim 21 (System Claim):
  This claim describes a system designed to control access to a facility. The system comprises:

  1. A plurality of beacon modules, each with a unique identification, employing wireless technology.
  2. A server responsible for authenticating handsets or users.
     The beacon modules are specifically configured to:
  • Receive identification signals from various radio transmitters (associated with users).
  • Measure a radio signal attribute (e.g., RSSI) that indicates the distance of each transmitter from the beacon module.
  • Determine the relative location of each radio transmitter with respect to an "expected location" (e.g., near a gate), by comparing it to the relative locations of other transmitters.
  • Ultimately, determine that the user granted access is the one most likely to be situated at the expected location.

CAFC 2026 Dockets Search:
A search of CAFC dockets for patent number 10783506 as of April 26, 2026, did not return any explicit results indicating ongoing legal challenges related to this specific patent number.

Uncertainty Note:
All information regarding the patent's details, claims, and abstract is directly extracted from the provided patent text, which is deemed authoritative. The absence of CAFC docket results in a quick search does not definitively prove a lack of litigation, but rather that no obvious cases were found with the direct patent number reference.

A search for US patent 10783506 in the CAFC 2026 dockets did not yield any specific cases directly referencing this patent number as of April 26, 2026. General CAFC news for 2026 indicates ongoing patent eligibility rulings (e.g., regarding gene therapy claims and software claims), but these are not tied to patent 10783506. To definitively confirm the absence of litigation, a more exhaustive search through CAFC case records would typically be conducted, potentially involving search by parties involved with Transparent Wireless Systems LLC, which is beyond the scope of a simple patent number search. The USPTO provides various tools for searching patents, including for assignments and ownership changes, but does not directly link to CAFC litigation dockets.