Laser beam machining apparatus, focus positioning device for laser beam machining apparatus, and converged laser beam diameter measuring device
CA 2228192 C · Owner: Miyagawa, Hirokazu · Inventors: Miyagawa, Hirokazu; Tanaka, Hisao; Sato, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The laser machining apparatus according to the present invention holds a plate-formed work W giving tension thereto and comprises a driver base/a work base driving the work in the axial direction, a converging lens for a laser beam L a laser, machining head moving in a direction in which the laser beam L is focused onto the work, an upper work holding member having nozzle for laser beam irradiation integrated thereto a, bellows for relatively and displaceably connecting the laser machining head and the upper work holding member in the focusing direction, and a lower fixed base/a highly slippery plate located and fixed at a position corresponding to a center of the nozzle, and the work is …
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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 January 29, 1998 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2020.
- 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.