Drafting instrument
CA 1289350 C · Owner: Spector, George · Inventors: Roach, Daniel F.; Spector, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protractor quadrant too accessory is provided and consists of two arms attached pivotally together at one end degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is …
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 September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
- 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.