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Expired Canadian patentCanada

Transmission having cassette type supplementary change speed apparatus

CA 1270127 C · Owner: Yamanishi, Isamu · Inventors: Yamanishi, Isamu; Horii, Yasuyuki; Umemoto, Tomeo

CIPO record

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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 transmission comprises a main change speed mechanism, an auxiliary change speed mechanism a rear, differential mechanism and a cassette type supplementary change speed mechanism. The supplementary change speed mechanism acts on the transmission through an opening defined in a transmission case housing the transmission. The supplementary change speed mechanism is housed in and supported by a supplementary change speed case which is attached to the transmission case. Transmissions of various specifications may be provided by making various types of supplementary change speed mechanism. The supplementary change speed mechanism is applicable to a propelling transmission line and/or a power …

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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 June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
  • 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 6, 1986
GrantedJune 12, 1990
Term endedJune 12, 2007
Patent numberCA 1270127 C
Classification (IPC)F16H37/00 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedMay 6, 1986Patent grantedJune 12, 1990Term endedJune 12, 2007

Sources & verification

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