Improvements in or relating to laser marking arrangements
CA 2114109 C · Owner: Technology Systems Limited · Inventors: Gaskell, Edwin Deric; Stevens, William Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure relates to a laser marking system using a displaceable mirror , to cause the path of the laser beam to scan in one direction. The mirror is conveniently controlled by at least one flexure hinge driven by a piezoelectric device an electro-stric-, tive device or a magneto-strictive device. In one disclosed embodiment two mirrors (15, 16) are provided, each mirror (15 or 16) having a flexure hinge device (18, 19) individual thereto; and the displacements applied to the said flexure hinge devices (18 19), via respective driving devices (20 21), cause the mirrors (15; l6) to scan the path of the laser beam (13) in a series of steps in one direction of scan: A computer (11), …
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 July 26, 1991 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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.