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Expired Canadian patentCanada

Radial access drive for an optical disk recorder

CA 1189190 A · Owner: Xerox Corporation · Inventors: Cheng, David; Chai, Stephen T.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An optical disk recorder in which the optical disk the drive, spindle and the disk drive motor are moved or pivoted in an arcuate path relative to stationary laser optics. When moved in such an arcuate path the optical disk, spindle and drive motor have a lessened movement of inertia (compared to linear movement thereof) which permits relatively fast accessing of an optical disk without a large drive motor. The accessing system can be naturally statically balanced by placing the spindle and the drive motor or opposite sides of the pivot point.

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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 18, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 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.
FiledMarch 23, 1983
GrantedJune 18, 1985
Term endedJune 18, 2002
Patent numberCA 1189190 A
Classification (IPC)G11B19/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMarch 23, 1983Patent grantedJune 18, 1985Term endedJune 18, 2002

Sources & verification

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