Telephone set comprising a line voltage stabilizer having a dc supply point
CA 1267738 C · Owner: Sijbers, Peter J.M. · Inventors: Sijbers, Peter J.M.; Van Dongen, Frederik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Telephone set comprising a line voltage stabilizer having a DC supply point", A telephone set comprising an active line voltage stabilizer circuit (4) provided with two output terminals 10-1 and 10-2 between which there is present a constant direct voltage which is independent of the line current. By connecting to these output terminals a series arrangement of a capacitor (14) and a resistor (18) a DC supply connection is obtained which does not affect the AC impedance of the stabilizer circuit between the wires and which shows a considerably lower output impedance than supply points known thus far in an electronic telephone set. Sole figure.
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.