Double-ended heading punch and method
CA 1079461 A · Owner: Procor Limited · Inventors: Wang, William H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A punch for forming a fastener head has a shaped projection at each end ant is releasably secured in a holder with one end abutting against a ledge on the inside of the holder and the other end extending beyond the holder. The shaped projections are formed simultaneously by a pair of hobs in one press stroke.
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 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 1997.
- 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.