Motion detector
CA 1290836 C · Owner: Lectron Products, Inc. · Inventors: Maples, David T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A motion detector particularly adapted for use with the transmitter of a motor vehicle keyless entry system. The motion detector causes the transmitter device carried by the user to transmit a coded signal when it is in motion, for example as it is being carried by a user, toward the vehicle. The motion detector includes a spool surrounded by and electrically insulated from a shell. A ball is positioned in the annular cavity around the spool. Associated electronics are provided to sense a change in state of the motion detector as an indication of motion. Changes of state of the motion detector occur when the ball moves into and out of direct contact with the spool or shell and further as …
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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 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.