Locking system operated by telephone devices in the present invetion comprises of an intergrated circuit in from of chip on board. It contains dual tone multiple frequency transmitter, voice read only membery one serial data input line for 16 bit code, one serial data output, 3 digital input pines for unique code fo...
[Class : 9] Scientific, Nautical, Surveying, Electric, Photographic, Cinematographic, Optical, Weighing, Measuring, Signalling, Checking (Supervision), Life Saving And Teaching Apparatus And Instruments; Apparatus For Recording, Transmission Or Reproduction Of Sound Or Images; Magnetic Data Carriers, Recording Discs; Automatic Vending Machines And Mechanisms For Coin Operat...
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