Optical-to-electric transducer with extended dynamic range
CA 2062216 C · Owner: Heidemann, Rolf · Inventors: Heidemann, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical receivers in optical communication systems should have a great dynamic range, since the receiver should be able to process optical signals whose levels may vary widely depending on the location of the receiver. According to the invention an optical amplifier, par-, ticularly a fiber amplifier is provided through which, the incoming optical signal passes before entering the transducer proper and whose gain or attenuation factor us controlled in accordance with the electric output signal of the transducer.
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 March 3, 1992 and granted May 19, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2014.
- 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.