Cable television channel selector/descrambler for use with cable-ready video appliances
CA 1319189 C · Owner: Martin, Thomas F. · Inventors: Fullingim, John; Martin, Thomas F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cable television channel selector/descrambler enables the full capabilities of a cable-ready video appliance (e.g. television set or VCR) to be used in conjuncton with a cable television system providing unscrambled channels and scrambled premium channels. A broadband cable signal containing a plurality of television signal channels having different frequencies is passed through a filter to produce a modified cable signal having one of the signal channels removed therefrom. The broadband cable signal is input to a tuner for selectively tuning only to scrambled signal channels contained in the broadband cable signal. The tuner is tuned to a scrambled signal channel to be viewed by stepping …
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 June 15, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 15, 2010.
- 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.