Apparatus and method for clock alignment and switching
CA 2193207 C · Owner: Dsc Communications Corporation · Inventors: Sloan, Keith A.; Lovell, Mark A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a telecommunication system (figure 1) having multiple timing subsystems (14, 16 and 18) receiving and distributing redundant timing signals there is , provided a circuitry for aligning first and second redundant timing signals (CLOCK A and CLOCK B) and switching therebetween. The circuitry includes a selecting and switching circuitry for receiving the first and second redundant timing signals (CLOCK A and CLOCK B) and designating one of the redundant timing signals as ACTIVE and the other as INACTIVE and providing the ACTIVE , timing signal as an output timing reference signal. The selecting and switching circuitry further switching the ACTIVE and INACTIVE timing signal …
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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
- Filed June 5, 1995 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2017.
- 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.