Expired Canadian patentCanada
Spread-spectrum communication apparatus
CA 1279898 C · Owner: Tomioka, Takeshi · Inventors: Tomioka, Takeshi; Tsubouchi, Kazuo; Mikoshiba, Nobuo
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a spread-spectrum communication apparatus using a convolver as a correlator, demodulating processes in a receiver apparatus using a carrier and a PN code are performed under a non-synchronous condition.
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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 February 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 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.
FiledJanuary 13, 1989
GrantedFebruary 5, 1991
Term endedFebruary 5, 2008
Patent numberCA 1279898 C
Classification (IPC)H04J13/00 +2 more
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.