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Expired Canadian patentCanada

Device including detecting means comprising a phase comparator

CA 1065441 A · Owner: Jaeger · Inventors: Blanchier, Jean-Claude

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

The specification describes a switch condition transmitting device comprising a first assembly consisting of a switch and at least two coils which are serially connected when the switch is closed; the second assembly comprising at least a transmission coil and detection coil; the coils of the second assembly being magnetically coupled to each other and being positioned so that in one relative position of the assemblies, the transmission coils magnetically couple to one coil of the first assembly while the, detection coil is magnetically coupled to the other coil of the first assembly; exciting means for causing the transmission coil of the second assembly to generate; an alternating …

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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 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedOctober 30, 1979
Term endedOctober 30, 1996
Patent numberCA 1065441 A
Classification (IPC)G01L17/00 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedOct 30, 1979Term endedOct 30, 1996

Sources & verification

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