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Expired Canadian patentCanada

Air flow adjusting mechanism for hand held hot air hair dryers

CA 1233980 A · Owner: Ishihara, Naoki · Inventors: Ishihara, Naoki

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

In a hand held hot air hair dryer wherein air is pulled, in by a fan in a direction axially to the fan andthen moved about the axis and through a heating mechanism to exit through a nozzle air flow adjusting mechanism is provided to leak air flowing about the axis and thereby selectively adjusting the hot air flowing out the nozzle, without inducing any substantial changes of load to the motor driving the fan.

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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 March 15, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 15, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 17, 1984
GrantedMarch 15, 1988
Term endedMarch 15, 2005
Patent numberCA 1233980 A
Classification (IPC)A45D20/12

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedFeb 17, 1984Patent grantedMarch 15, 1988Term endedMarch 15, 2005

Sources & verification

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