Hand trucks with pivotally connected, spreadable, wheel-supported, auxiliary support frames
CA 2089713 C · Owner: Magline, Inc. · Inventors: Mortenson, Carl N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand truck with an upright main frame and a handle part at its upper end has a forwardly extending nose at its lower end for supporting a load thereon which rests back against the main frame when the main frame is in vertically rearwardly tilted position, and a wheel and axle assembly at its lower end to support it for travel. An auxiliary support frame, having a ground engaging wheel at its lower end is pivotally connected near its upper end to the main frame for movement from the main frame to a spread position. A rearwardly extendible first link structure, pivotally connected to the main frame, is hingedly connected to a second link structure, pivotally connected to the auxiliary …
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 February 17, 1993 and granted October 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2015.
- 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.