Expired Canadian patentCanada
Method of and apparatus for correcting picture errors in dpcm signal reception
CA 1280508 C · Owner: Siemens Aktiengesellschaft · Inventors: Strehl, Herbert
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Picture signal values of only a small number of picture lines are intermediately stored during reception and from these an error trail is recognised and the adulterated picture signal values are replaced by correction values.
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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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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 22, 1986
GrantedFebruary 19, 1991
Term endedFebruary 19, 2008
Patent numberCA 1280508 C
Classification (IPC)H04N7/12 +1 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.