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Expired Canadian patentCanada

Terminator current driver

CA 1301840 C · Owner: Bnr, Inc. · Inventors: Newton, Stephen James

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 drive circuit for terminators in a SCSI (Small Computer Standard Interface) system comprises a bipolar transistor operating in saturated condition to keep the voltage drop to less than 200 millivolts. A second transistor serves to detect when due to overcurrent conditions, the first transistor goes out of saturation and turns it off. Also provided is means for ensuring that the first transistor turns on before the second transistor on power-up.

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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledAugust 3, 1988
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301840 C
Classification (IPC)H03K17/16 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 3, 1988Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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