Bone fixation screws
CA 1196243 A · Owner: Howse (D.) & Company Limited · Inventors: Howse, Derek L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bone fixation screw having a shaft with a head at one end and a screw thread at the other end is also provided with a screw thread on the shaft under and adjacent to the head. In use the screw thread will engage with the hard cortex bone to provide a firmer fixation. The head may have in known manner a screw-threaded projection for receiving a nut which can tighten up a fixation plate against the head.
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, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2002.
- 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.