Screwdriver and screw for use therewith
CA 1078229 A · Owner: Tayelor, Francis A. · Inventors: Tayelor, Francis A.; Johnson, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification describes an improved screwdriver and screw constructed in such a manner that the two are maintained in proper alignment during use and so that the screw may be held on the end of the screwdriver without the use of one's hand. The screwdriver is formed with an axial projection at its tip which is adapted to be received in an axial bore in the head portion of the screw. To grip the screw to the screwdriver the projection and, bore are constructed so that there exists an interference tapered fit when the driver and screw are drivingly engaged.
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 May 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 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.