Method of mounting laser diode unit
CA 2006001 C · Owner: Tanaka, Haruo · Inventors: Tanaka, Haruo; Nakata, Naotaro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an optical pick-up arranged to detect information recorded on an optical disk by causing laser light projected onto and reflected from a signal surface of the optical disk disposed within an optical system to be, received by a light receiving element provided in the optical system, a method of mounting onto the optical pick-up, a laser diode unit that includes a metallic substrate, and a laser diode, a photo-diode a current, feeding lead portion to the laser diode and a current output lead portion from the photo-diode respectively, provided on an upper face of the metallic substrate for emitting laser light. The laser diode unit is positioned and fixed at a predetermined position in the …
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 December 19, 1989 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2011.
- 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.