Drawing machine
CA 2006867 C · Owner: Enami, Toshiaki · Inventors: Enami, Toshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drawing machine for drawing a workpiece (41) comprises first and second drawing dies (42 43), first, and second push rods (45, 46 47, 48) and first and second, junction rods (53 54). When the first push rods (45, 46) are downwardly moved, the first junction rod (53) is pressed and moved by the first push rod (45) to press the first drawing die (42). Consequently, the first drawing die (42) forms a first-stage drawn part in the workpiece (41). When the second push rods (47, 48) are downwardly moved, the second junction rod (54) is pressed and moved by the second push rod (48), to press the second drawing die (43). Consequently, the second drawing die (43) forms a second-stage drawn part in …
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 28, 1989 and granted August 30, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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.