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Expired Canadian patentCanada

Hand control system

CA 1263446 C · Owner: Wright State University · Inventors: Petrofsky, Jerrold S.

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

A system for stimulating a grasping action by a paralyzed hand. The system includes a sensor arrangement for detecting movement of a shoulder by the paralyzed person. The sensor transmits shoulder movement signals to a computerized controller which generates stimulation signals for stimulation electrodes mounted within a cuff worn about the forearm which supports the hand to be stimulated. Closed loop control is accomplished by use of a glove to which are attached a length sensor and a pressure sensor connected for alternative selection.

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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 November 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 23, 1984
GrantedNovember 28, 1989
Term endedNovember 28, 2006
Patent numberCA 1263446 C
Classification (IPC)A61N1/36 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedNov 23, 1984Patent grantedNov 28, 1989Term endedNov 28, 2006

Sources & verification

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