Optical transmitter
CA 2398658 A1 · Owner: Yamabayashi, Naoyuki · Inventors: Kuhara, Yoshiki; Yamabayashi, Naoyuki; Shiozaki, Manabu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical transmitter capable of holding the power of an LD at a constant by monitoring the amount of light from the LD on a monitor PD (photo diode) and giving a feedback, characterized in that a recessed groove is provided in a substrate, a monitor PD (photo diode) is installed on the sloped surface of the recessed groove, and the light from the LD installed horizontally opposite to the monitor PD (photo diode) is received directly by the monitor PD (photo diode), whereby the size and cost of the transmitter can be reduced while allowing a large amount of light from the LD to be inputted into the monitor PD (photo diode), and a transmission can be performed at a higher speed.
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 November 29, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2023.
- 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.