Protection switching apparatus and method
CA 2173367 C · Owner: Opoczynski, Adam · Inventors: Opoczynski, Adam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protection switching system (10) includes a plurality of telecommunications modules (12 14A. 14B, 16A, 16B) for processing, and/or switching telecommunications signals. A first module (12) provides signals to one pair of modules (12A 12B), which are in turn, connected to another pair of modules (16A 16B). A standby module (14B, 16B) controls the switching of all the modules (12 14A, 14B, 16A, 16B) in the system (10) which require switching in the event that a standby module (14B 16B) is activated. A controller monitor circuit (20) monitors the faults present on the working modules (14A 16A) and, if a fault is detected, signals the corresponding standby module (14B, 16B), which in turn …
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
- Filed October 4, 1994 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2016.
- 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.