US Patent Issued to InvenSense on March 18 for "Ultrasonic liquid level sensing" (California Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,401, issued on March 18, was assigned to InvenSense Inc. (San Jose, Calif.).

"Ultrasonic liquid level sensing" was invented by Cristabel Yang (Berkeley, Calif.), Richard J. Przybyla (Piedmont, Calif.) and Mitchell Kline (Alameda, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods for ultrasonic liquid level sensing. A circuit causes an ultrasonic transducer to transmit a sequence of ultrasonic pulses and receive a sequence of reflected signals. Each reflected signal includes at least one first reflection associated with at least one non-moveable surface and at least one second reflection associated with a moveable surface. A ...