Optical communication module
CA 2282102 C · Owner: Ishizaka, Masashige · Inventors: Ishizaka, Masashige
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Peltier cooler is situated in a module casing and combined, with a metallic block, on which a lens is mounted. A thermistor an electroabsorption modulator integrated DFB laser (a laser unit) a monitoring photosensor are mounted on the metallic block. A signal line of a co-planar structure which is connected with a signal input pin supplied with an external signal is laid on a ceramic substrate under which a pedestal is formed. A part of the ceramic substrate on the pedestal is removed, and an amplifier is mounted on the pedestal in condition that it approximates to the laser unit. The laser unit is connected with the amplifier by an Au wire and the amplifier is, connected with the signal …
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 September 13, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2021.
- 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.