Locking wrenches
CA 2090112 A1 · Owner: Blue Water Holding Company, Inc. · Inventors: Mills, J. David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved locking wrenches (10) are provided with handle-restraining means (18) to restrain the upper and lower operating handles (20, 28) against movement into their opened state when in a closed state thereof. The handle-restraining means (18) includes first (e.g. 50, 52) and second (e.g. 46, 48) restraining elements respectively forming a part of the lower operating handle (28) and the adjustment screw (42). The first and second restraining elements may be brought into cooperative adjacent relationship with one another when the upper and lower operating handles (20 28) are, moved into their closed state thereof whereby the upper and lower , operating (20 28) handles may be restrained …
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 August 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2013.
- 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.