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Expired Canadian patentCanada

Edge grinding of glass

CA 1114616 A · Owner: Bando Kiko Co. Ltd. · Inventors: Bando, Shigeru

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

A beveling machine having a table provided with a plurality of fixing stands in tandem for fixing glass plates and a head stand carrying working heads equipped with working wheels rotatably in the same number as the fixing stands comprises means for causing the table and the working heads to conduct a relative movement in two directions in a horizontal plane, means for spinning the working wheels around a vertical axes. The relative movement of the table and the working head, in the two directions and the spinning movement of the working wheels around the vertical axes in the machine are controlled by a numerical control device in which the face of the glass plates to be ground and the …

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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 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 21, 1978
GrantedDecember 22, 1981
Term endedDecember 22, 1998
Patent numberCA 1114616 A
Classification (IPC)B24B9/10

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 21, 1978Patent grantedDec 22, 1981Term endedDec 22, 1998

Sources & verification

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