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Expired Canadian patentCanada

Display device with price-change cartridges

CA 1136854 A · Owner: The Mead Corporation · Inventors: Clement, Joseph

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 display device such as is used to display information relating to the description and price of goods for sale comprises a facia panel (10) to which is attached one or more cartridges (20) each carrying self-coiling information strips (29,30,31) readily adjustable so that the information regarding the goods may be quickly and easily changed, the attaching means (27, 28) provided on the cartridge (20) and the attaching means (13, 14, 15, 16) provided on the facia panel (10) co-operating to provide a push-pull connection.

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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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
  • 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 19, 1980
GrantedDecember 7, 1982
Term endedDecember 7, 1999
Patent numberCA 1136854 A
Classification (IPC)G09F11/18 +2 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedNov 19, 1980Patent grantedDec 7, 1982Term endedDec 7, 1999

Sources & verification

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