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Expired Canadian patentCanada

Magnetic recording head array with staggered head arrangement

CA 1191608 A · Owner: International Business Machines Corporation · Inventors: Franaszek, Peter A.; Yarmchuk, Edward J.

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Abstract From the Canadian patent

A magnetic recording head array for printing onto a transfer magnetic recording medium which prints magnetic material onto a medium such as paper includes staggered arrays of magnetic print heads. The heads are in diagonally staggered parallel arrays tilted away from the vertical. Each array in a group of several arrays is also staggered in the vertical direction as well as the longitudinal direction. Preferably the heads or other bistable elements, are wired in clusters with the heads or other elements in the cluster being coupled to the same actuator wires in a half-select type of wiring arrangement. The difference in the wiring of the elements will reside in the sense of the signal as …

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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 August 6, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 27, 1983
GrantedAugust 6, 1985
Term endedAugust 6, 2002
Patent numberCA 1191608 A
Classification (IPC)G11B5/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 27, 1983Patent grantedAug 6, 1985Term endedAug 6, 2002

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