Rail Vision Ltd. announced it received notice of allowance from the United States Patent and Trademark Office (USPTO) for its patent titled, “system and method for built-in test for optical sensors". The new patent allowance covers the Company's industry-leading, cutting-edge, artificial intelligence (A.I.) based technology, specifically designed for railways, and its ability to perform built-in, real-time tests of the optical sensor. The system can detect a reduction in optical quality and determine issues with “external optical disturbances” (EOD) and/or failure of the optical sensors, by that increase the trust of operators to rely on technology.