Playback apparatus
CA 1093687 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Melwisch, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A playback apparatus for a record carrier on which a frequency-modulated carrier signal, such as a television signal is recorded includes a transducer arrangement for scanning the record carrier. The output signal from the transducer consisting, of a frequency modulated signal with a carrier and at least the lower side band, is applied to a limiter and demodulator for the demodulation of the signal. At least one filter is included be-, fore the limiter and demodulator, whose transfer function is variable depending on the amplitude of the carrier signal the amplitude, of the carrier signal, when it decreases being boosted relative, to the amplitudes of the signal components in the lower side …
Read the whole patent
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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 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.
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.