Data transmission method and apparatus by period shift keying (tsk)
CA 1293301 C · Owner: Hamilton, Scott L. · Inventors: Frederick, Richard B.; Naddor, David J.; Schaubs, Randolph J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for transmitting and receiving a period shift keyed data stream comprises a data processing means such as a microprocessor which may control the generation of the waveform as well as the determination of the bit values of an incooling signal. When the data to be transmitted comprises a plurality of data values each data value, is represented by a different predetermined frequency. Further each, data value is represented by the transmission of the predetermined frequency for a predetermined transitionary interval plus one cycle or period. One portion of the transitionary interval precedes and the remaining portion follows the one cycle. For example the data value, may be …
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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 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.