Wheel chock
CA 2003544 C · Owner: Allred, Thomas O. · Inventors: Moyer, Donald L.; Allred, Thomas O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wheel chock for restraining motor vehicles during transport comprises a monolithic body defined by a synthetic plastic molding or an aluminum casting and provided with a pair of locking pins and a latching mechanism for releasably securing it to a mounting rail fixed on a deck of the vehicle transporter. The chock also incorporates a reeling mechanism including a pawl, and ratchet locking device for holding and tensioning an over-, the-wheel safety harness.
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
- Filed November 21, 1989 and granted February 9, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2011.
- 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.