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Expired Canadian patentCanada

Image processor with free flow pipeline bus

CA 1312143 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Lang, Thomas Anthony; Laughery, Mark Stephen; Brown, Dwight Eugene

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Abstract From the Canadian patent

A digital image processing system (10) has a pipeline bus (30) for transferring addresses and data in parallel among the components of the system which include an, image memory (16), an address generator (18) and an intensity processor (20). The pipeline bus (30) includes a pipeline address bus (34), a pipeline data bus (36) and a master, timing bus (38). Through the use of handshake signals the, pipeline bus (30) permits a free flow of pipelined data among the components at whatever rate is necessary to complete the particular processing task. Image data is transferred in the form of N x N pixel subimage blocks which can be addressed using a single address.

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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 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 30, 1988
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1312143 C
Classification (IPC)G06T1/20

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 30, 1988Patent grantedDec 29, 1992Term endedDec 29, 2009

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