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Expired Canadian patentCanada

Internal combustion engines and devices employing same

CA 1313090 C · Owner: Tomonaga, Keisuke · Inventors: Fujikawa, Tetsuzo; Tomonaga, Keisuke; Tamba, Shinichi

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

An engine and power units employing the engine are provided which include a crankshaft oriented vertically and operatively connected to the engine, a liquid cooled radiator arranged above the engine substantially perpendicular to the crankshaft and a, cooling fan inter-posed between the engine and the radiator and operatively connected to the crankshaft. The engines and power units may be employed in motor vehicles and other equipment such as electrical generators.

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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 January 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 30, 1987
GrantedJanuary 26, 1993
Term endedJanuary 26, 2010
Patent numberCA 1313090 C
Classification (IPC)F01P11/10

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 30, 1987Patent grantedJan 26, 1993Term endedJan 26, 2010

Sources & verification

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