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Expired Canadian patentCanada

Automatic writing systems and methods therefor

CA 1052911 A · Owner: Xerox Corporation · Inventors: Swanstrom, H. Wallace; Campbell, Kenneth C.; Schaer, Werner

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

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Abstract From the Canadian patent

Automatic writing systems and method therefor are provided in accordance with the teachings of the present invention wherein, according to a preferred embodiment, a central processor and a plurality of peripherals including at least a keyboard a printer unit, a buffer and a transport station for recording data on a record media are each connected to a common data bus a common status bus, and a common instruction word bus. Alphanumeric character data format data, and function, data may be entered from the keyboard and the presence of such data is indicated to the central processor on the common status bus. Upon receipt of a data presence condition, program control is initiated by the central …

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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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedApril 17, 1979
Term endedApril 17, 1996
Patent numberCA 1052911 A
Classification (IPC)G06F7/00 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedApril 17, 1979Term endedApril 17, 1996

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