Voice coil actuator ii
CA 2115075 C · Owner: Aura Systems, Inc. · Inventors: Bulgatz, Dennis C.; Stuart, Keith O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A voice coil actuator (50) includes a magnetic flux conductive material core (52 52'), having a back plate (53) and a magnet (54), and an electrical current conductive coil (56 56'). The core (52, 52') has a first surface (58 58', 58") and a continuous, channel (60) disposed in said first surface (58 58', 58"). The channel (60) has a pair of opposing walls (62 64). The magnet (54) is, disposed in intimate contact with a first one of said walls (62 64) and spaced from a second one of said walls (62 64) so that a gap, remains between the magnet (54) and the second one of the walls (62 64). The magnet (54) has a first face (94) of a first magnetic polarity facing the first one of the walls (62 …
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 August 4, 1992 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2014.
- 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.