Writing device with multiple writing element
CA 1256403 A · Owner: Kabushiki Kaisha Japan Craft · Inventors: Yumoto, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-purpose writing device comprising plural writing elements, at least one of which is an automatic pencil that can be extended, can be extended to and retracted from or between the writing position and the housed position alternately by rotating a cylindrical cam. The cylindrical cam is sectioned diagonally with respect to the axis at its lower end to form a cam surface and is also provided with a translation cam inside thereof to provide a two-stage cam mechanism. Further, a flat portion each is made at the top and the bottom of the cam surface provided at the lower end of the cylinder member. A slider which connects with each writing element is stepped to provide slide projections …
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
- Granted June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- 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.