Daniel Adrian - Penn Valley PA, US Daniel Swartz - Gladwynne PA, US
International Classification:
G08B 1/08 G01S 13/08
US Classification:
340539320, 342139000
Abstract:
A set of mutually intercommunicating units each include a transmitter arrangement and a receiver responsive to a single encoded signal. Each transmitter arrangement produces any one of the encoded signals other than its own. Each unit is associated with an important or valuable item, such as keys, cellphone, wallet/purse and the like, which are liable to being misplaced. To find a misplaced unit, any other unit is procured, and its transmitter code associated with the missing unit is energized. The missing unit responds to the transmitted code by annunciating, allowing it to be located.