Pen construction
CA 1115237 A · Owner: Walgan Corp. · Inventors: Ganz, Walter C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiple unit writing instrument includes end to end relatively rotatable front and rear barrel sections a body member rotatable with the, front barrel section and a cylindrical cam rotatable with the rear barrel section and having in its outer face a longitudinal guide groove extending to the raised portion of the end cam face and slidably engaged by an actuating member. A pair of writing elements are slidable in guideways in the body member between advanced and retracted positions and carry followers engaging guide slots and the cam face. One of the writing elements is a mechanical pencil including a pencil lead engaging clutch controlled by a rearwardly projecting spring biased plunger …
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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
- 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.