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Expired Canadian patentCanada

Video camera system with white balance adjustment

CA 1330237 C · Owner: Yoshida, Masanobu · Inventors: Yoshida, Masanobu

CIPO record

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Drawings and full text

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

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Abstract From the Canadian patent

In a video camera system composed of exchangeable lens devices interchangeably mountable on a camera body having an image pick up element to generate a signal corresponding to a light image projected thereon by an imaging lens of the exchangeable lens device in use a, signal processing circuit responsive to the signal from the image pick up element for providing a color video signal and a white balance adjusting circuit for correcting the white balance of the color video signal; there are provided a memory for storing white balance correction data characteristic of each of the exchangeable lens devices; and a circuit responsive to the white balance correction data which is characteristic of …

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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 June 14, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 28, 1989
GrantedJune 14, 1994
Term endedJune 14, 2011
Patent numberCA 1330237 C
Classification (IPC)H04N9/73 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMarch 28, 1989Patent grantedJune 14, 1994Term endedJune 14, 2011

Sources & verification

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