Spectacle frame
CA 1319844 C · Owner: Sigma Co. Ltd. · Inventors: Okamura, Kenji; Yoshida, Mizuo; Okuda, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spectacle frame comprises a face-contacting portion such as a side and a lens-fixing portion such as a rim both the, portions being made of a shape memory alloy and connecting, members to be connected with the face-contacting portion and the lens-fixing portion. The connecting member is made of a .beta.-phase titanium alloy. The face-contacting portion and the lens-fixing portion are soldered to the connecting member with a palladium-based soldering material.
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 July 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 6, 2010.
- 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.