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Expired Canadian patentCanada

Disk drive architecture

CA 1305251 C · Owner: Bagnell, Glade N. · Inventors: Stefansky, Frederick Mark; Bagnell, Glade N.

CIPO record

Overview

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

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Abstract From the Canadian patent

A disk drive assembly which is resistant to physical shocks and thermally caused distortion including an end plate, a casing attached to the end plate, and a base plate enclosed in the casing and mounted to the end plate. The base plate supports a rotatable disk and an actuator assembly for reading information from and recording information on the disk. The end plate and the casing form a seal to provide a controlled environment within the casing and the base plate is attached to the end plate in the controlled environment. MEM\CONN04A, CONN5899MCF/MEM

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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 July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 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.
FiledMay 26, 1988
GrantedJuly 14, 1992
Term endedJuly 14, 2009
Patent numberCA 1305251 C
Classification (IPC)G11B17/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 26, 1988Patent grantedJuly 14, 1992Term endedJuly 14, 2009

Sources & verification

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