Spring unit
CA 1266926 C · Owner: Webster Spring Co. Inc. · Inventors: Hagemeister, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bent wire spring unit for interposition between a grid frame and base frame comprising upper and lower attaching elements and intervening spaced, parallel oppositely-facing, supports comprising vertical lengths of wire and at the upper and lower ends of the vertical lengths of wire V-shaped lengths of, wire, the legs of which are connected respectively, to the, vertical lengths of wire and to the attaching elements.
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 March 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2007.
- 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.