Light scanner
CA 2179837 C · Owner: Nippon Telegraph & Telephone Corporation · Inventors: Tateishi, Kazuyoshi; Arakawa, Ken'Ichi; Yoshida, Masaharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention offers a light scanner which is compact and highly precise during high-speed operation has, a long lifespan, and is resistant to influence by external acceleration. Specifically, a light beam emitted from an optical source is separated into two light beams by means of a light beam separation means, and these light beams are deflected by a mirror on the scanner. One of the light beams is used for the object of usage, while the other light beam is made incident on a photo detector which outputs a signal based on the incident position of the light beam, in order to determine the deflection angle of the light beam based on vibrations of the mirror.
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 June 25, 1996 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2018.
- 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.