Laser beam machining device
CA 2004677 A1 · Owner: Yamazaki, Etsuo · Inventors: Iehisa, Nobuaki; Yamazaki, Etsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laser beam machining device for machining a workpiece by irradiating a laser beam onto a surface of a workpiece is provided, and comprises a power sensor (21) for detecting the level of a reflected laser beam (11) fed back to a laser oscillator due to a reflection thereof by the surface of the workpiece (10) and an, abnormality detecting unit for stopping the operation of the laser oscillator and movement of the workpiece (10) and displaying an alarm at a display device (19) when the power level of the reflected laser beam (11) becomes higher than a predetermined value. The power level of the reflected laser beam (11) fed back to the laser oscillator is monitored by the power sensor (21) …
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 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 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.