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Expired Canadian patentCanada

Method of reformatting color television signals

CA 1287162 C · Owner: Rhodes, Charles W. · Inventors: Rhodes, Charles W.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method of reformatting color television signals is disclosed whereby chrominance and luminance components are serially arranged on a line by line basis with minimal compression of the luminance and chrominance components. This reduced compression serial arrangement is made possible by a truncation process whereby unnecessary information is eliminated from the television signal. Specifically since a normal television picture tube overscans the edges or thepicture are never displayed and need not be transmitted or recorded. By eliminating this unnecessary information the signals can be serially combined within the time limits inherent in standard signals.

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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 July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 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.
FiledJune 4, 1987
GrantedJuly 30, 1991
Term endedJuly 30, 2008
Patent numberCA 1287162 C
Classification (IPC)H04N11/02

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJune 4, 1987Patent grantedJuly 30, 1991Term endedJuly 30, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.