Method of carving portrait or the like on a card
CA 2071150 A1 · Owner: Hao Tse Chieng · Inventors: Suzuki, Akira; Chieng, Hao T.; Suzuki, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method of carving portrait or the like on a card and in particular to one utilizing a partition plate with a transparent portion and an opaque portion, and a photo-sensor to detect the transparent portion or opaque portion of the partition plate so as to send out a signal to an electronic switch to selectively control a literal visual frequency camera or a diagram visual frequency camera which will actuate a driving device to control a needle to work at line-carving or point-carving mold, whereby a portrait or the like may be rapidly carved on a card.
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 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2014.
- 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.