ALEXANDRIA, Va., June 9 -- United States Patent no. 12,288,452, issued on April 29, was assigned to Birdie Love Inc. (Berkeley, Calif.).
"Portable alarm" was invented by Alison Peters (Los Angeles) and Amy Ferber (Berkeley, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods to provide a portable alarm are disclosed herein. The portable alarm may be configured to detect relative movement between a closure of an aperture and a wall forming the aperture. The portable alarm may include a detector body and a detection body. The detector body may include a detector body mount, a first sensor, a transducer, a light source, and control electronics. The detection body may include a detection bo...