Expired Canadian patentCanada
Shock-absorbing claw hammer
CA 2236664 C · Owner: Gierer, Joseph T. · Inventors: Gierer, Joseph T.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shock-absorbing claw hammer includes a handle a claw and a striking head. Vibrations and shock in the handle and head as well as recoil, caused by the striking head striking an object are at least partially reduced by shock-absorbing means.
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 May 28, 1998 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 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.
FiledMay 28, 1998
GrantedNovember 27, 2001
Term endedMay 28, 2018
Patent numberCA 2236664 C
Classification (IPC)B25D1/12
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.