Construction framing square
CA 2178333 C · Owner: Tedsen, Michael P. · Inventors: Butcher, Richard L.; Tedsen, Michael P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multipurpose rectangular layout Ultra-square (11) which incorporates attributes of a triangular shaped square and carpenters square and is designed for use in conjunction with a tape measure (40). The tape measure (40) is attached in such a way that it forms a right angle to the layout square (11) for measuring distances for framing layout enabling a user to mark multiple parallel lines in a perpendicular direction at specified distances measured from the end of the tape. The square (11) has indicia (26 27, 30) in calibrated scales for rafter angle and linear measurements. The square base (12) extends elongated. A guide (13) is attached at a right angle and perpendicular to the base. The …
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 December 8, 1994 and granted June 29, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2016.
- 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.