Twist actuated writing instrument
CA 1291724 C · Owner: Lembeck, Michael · Inventors: Lembeck, Michael; Koeln, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A twist actuated writing instrument comprised of a barrel, a cap, a two-directional cam, and an actuator wherein the barrel, the cap, the two-directional cam and the actuator, axially encase a writing element and a spring and wherein the cap may be rotated in either a clockwise or counterclockwise direction relative to the barrel, such that when the cap is rotated in either direction relative to the barrel the writing element will, be advanced to the writing position and when the cap is rotated in the opposite direction relative to the barrel the writing, element will retract.
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 November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2008.
- 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.