Frequency modulation transmitter circuit arrangements for voice or data
CA 1197559 A · Owner: Western Electric Company, Incorporated · Inventors: Nash, Donald H.; Lese, Gregory
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable frequency modulation transmitter (1) for voice or data is disclosed for operation at infrared frequencies. The transmitter comprises keyboard (200) or microphone (402) input capability and dual modes of use. In the data mode carrier is generated when the keyboard is operated and is not generated when the keyboard is idle in order to conserve power. In the voice mode either voice, or data may be transmitted data having priority over, voice. A series connection of two variable modulus counters (302,303) and other counters (304,305,306) provide a frequency shift keyed data signal marker data, signal, marker data frames between data frames parity, insertion and other features. In the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 3, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.