US 12268475

US patent 12268475, titled "Wearable device for differential measurement on pulse rate and blood flow," was granted to Omni Medsci Inc. The inventor is Mohammed N. Islam. The application was filed on October 25, 2024, and the patent was issued on April 8, 2025.

The abstract describes a wearable device featuring one or more biosensors for measuring physiological parameters, specifically pulse rate and blood flow, using a differential measurement technique. The device includes a light source with multiple light-emitting diodes (LEDs) generating output optical light with one or more wavelengths. Lenses direct this light to tissue (e.g., skin), and a detection system receives the reflected light to generate an output signal indicative of the physiological parameters. This detection system is synchronized with the light source and comprises spatially separated detectors and at least one analog-to-digital converter. The device enhances the signal-to-noise ratio (SNR) by increasing the light intensity of at least one LED and by comparing signals received when the LEDs are off (ambient light) versus when they are on. The apparatus is also configured to determine if it is being worn by the user based on the output signal.

Independent Claim Overview

US patent 12268475 contains one independent claim:

• Claim 1: This claim describes a wearable apparatus designed to be worn by a user. It includes one or more biosensors that measure physiological parameters, specifically involving a differential measurement for pulse rate and blood flow. The apparatus has a light source made of multiple LEDs producing light of various wavelengths. Lenses are used to focus this light onto the user's skin. A detection system then receives the light reflected from the tissue and generates a signal related to the physiological parameters, aiming for a high signal-to-noise ratio. This detection system is synchronized with the light source, uses multiple spatially separated detectors, and includes at least one analog-to-digital converter. The apparatus improves the signal-to-noise ratio by increasing the LED light intensity. Additionally, the detection system achieves a higher signal-to-noise ratio by comparing measurements taken when the LEDs are off (ambient light) with those taken when the LEDs are on. Finally, the apparatus can determine if it is being worn by the user based on these signals.

Uncertainty Note: The provided context does not include results from a live USPTO database search for specific legal status or full CAFC 2026 dockets beyond what is already mentioned in the Google Patents listing, such as current active status and pending PTAB and district court cases. Therefore, this summary relies on the information available in the provided patent text.

The provided patent text includes several "Definitions" that describe "a wearable device" and "a system" in a claim-like structure. These are descriptions of aspects of the invention, but they are not presented as formal independent claims within a "Claims" section. Therefore, I will only provide an overview of the single independent claim found in the numbered "Claims" section of the patent.

Based on the patent text provided, the details for US12268475 are as follows:

• Title: Wearable device for differential measurement on pulse rate and blood flow
• Assignee: Omni Medsci Inc
• Inventors: Mohammed N. Islam
• Filing Date: 2024-10-25
• Issue Date: 2025-04-08
• Abstract: A wearable device adapted to be worn by a user is disclosed. The apparatus comprises one or more biosensors adapted to be placed on the user, wherein one or more physiological parameters are measured, wherein measuring of the one or more physiological parameters comprises a differential measurement, and wherein the one or more physiological parameters comprises a pulse rate monitoring and a blood flow measurement. The apparatus also comprises a light source comprising a plurality of light emitting diodes that are configured to generate an output optical light having one or more optical wavelengths. The apparatus also comprises one or more lenses configured to receive at least a portion of the output optical light and to deliver a lens output light to tissue comprising skin. The apparatus further comprises a detection system configured to receive at least a portion of the lens output light reflected from the tissue and to generate an output signal is indicative of the one or more physiological parameters that has a signal-to-noise ratio. The detection system is configured to be synchronized to the light source, comprises a plurality of detectors that are spatially separated from each other, and at least one analog to digital converter is coupled to at least one of the plurality of detectors. The apparatus is configured to increase the signal-to-noise ratio by increasing light intensity of at least one of the plurality of light emitting diodes from an initial light intensity. The detection system further configured to generate a first signal responsive to light received while the light emitting diodes are off, generate a second signal responsive to light received while at least one of the light emitting diodes is on, and increase the signal-to-noise ratio by comparing the first signal and the second signal. The apparatus is at least in part configured to determine, based at least in part on the output signal, that the apparatus is being worn by the user.

Plain-Language Overview of Each Independent Claim:

• Independent Claim 1: This claim describes a wearable device designed to be worn by a person. It includes biosensors that measure health indicators like pulse rate and blood flow, using a method that takes a differential measurement. The device has a light source made of several LEDs that produce light of different colors. Lenses are used to focus this light onto the user's body tissue, such as skin. A detection system then receives the light that bounces back from the tissue and creates a signal indicating the health measurements, aiming for a clear signal with minimal noise. This detection system works in sync with the light source and uses several detectors that are spaced apart, each connected to an analog-to-digital converter. To make the signal clearer, the device can increase the brightness of the LEDs. Furthermore, it improves signal clarity by comparing readings taken when the LEDs are off (measuring only ambient light) with readings taken when the LEDs are on. The device can also tell if it is currently being worn by the user based on these measurements.

Note on Litigation:
The Google Patents link for US12268475 shows that the patent is currently "Active" and has "Family litigation". Specifically, it notes:

• Critical: First worldwide family litigation filed.
• PTAB case PGR2025-00063 filed (Not Instituted - Procedural).
• PTAB case IPR2025-01254 filed (Pending - Instituted).
• US case filed in Texas Eastern District Court (case 2:26-cv-00289).
• US case filed in Texas Eastern District Court (case 2:25-cv-00483).
• US case filed in Delaware District Court (case 1:25-cv-00140).

As of April 26, 2026, the CAFC dockets found in the search results did not specifically mention patent 12268475. The results for CAFC cases in 2026 mention other patent numbers and general patent infringement types. The USPTO search results primarily provided general information about the USPTO itself, how to search patents, and recent news, but not specific status updates for patent 12268475 beyond what was in the Google Patents listing.