ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,207,880, issued on Jan. 28, was assigned to NIDEK Co. LTD. (Aichi, Japan).
"Ultrasonic tonometer" was invented by Tetsuyuki Miwa (Aichi, Japan), Tsutomu Uemura (Aichi, Japan) and Kazunari Shimizu (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ultrasonic tonometer for measuring the eye pressure of an examinee's eye by means of an ultrasonic wave includes an ultrasonic actuator having an ultrasonic element and configured to irradiate the examinee's eye with the ultrasonic wave, and current adjustment means configured to adjust a current applied to the ultrasonic element to control the sound pressure or acoustic radiation pressure of the u...