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Expired Canadian patentCanada

Circuit arrangement for frequency division

CA 1111510 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Kasperkovitz, Wolfdietrich G.

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 wide-band n-divider having a first and a second group of n transistors each, whose emitters in a first cyclic sequence are alternately connected to the collectors of two transistors forming an input differential pair. The base electrode of any arbitrary transistor of said first cyclic sequence is always connected to the collector of the (n-1)th transistor after said arbitrary transistor in said first sequence. The n-divider furthermore comprises a third and a fourth group of n transistors each whose, emitters are alternately connected to the collectors of two transistors which constitute an input differential pair in a second cyclic sequence, and whose collectors in the second sequence …

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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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 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.
FiledNovember 9, 1978
GrantedOctober 27, 1981
Term endedOctober 27, 1998
Patent numberCA 1111510 A
Classification (IPC)H03K23/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedNov 9, 1978Patent grantedOct 27, 1981Term endedOct 27, 1998

Sources & verification

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