ALEXANDRIA, Va., June 10 -- United States Patent no. 12,294,671, issued on May 6, was assigned to AIPHONE Co. LTD. (Nagoya, Japan).
"Multiple dwelling house interphone system" was invented by Yuta Shimomura (Nagoya, Japan), Masashi Hattori (Nagoya, Japan), Kimiaki Fujishima (Nagoya, Japan) and Ryoji Uno (Nagoya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multiple dwelling house interphone system include a collective entrance machine, a dwelling room master device, a management master device, and a sensor. When the sensor detects the occurrence of the abnormality, an abnormality occurrence signal is transmitted from the dwelling room master device to the management master device, and the dwelling ...