Attitude sensor
CA 2109717 C · Owner: Rees, Anthony Ivor · Inventors: Crocker, Timothy Richard; Rees, Anthony Ivor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An attitude sensor in which a spherical ball (1,1) is suspended in a fluid (11) contained in a housing (22); the sensor is maintained neutrally with respect to the fluid and has a means (17,33) for maintaining the ball out of direct contact with the housing and a means,(17,33) for detecting the orientation of the ball. The sensor is particularly useful as a compass in which case magnets (15,80) may be provided or else a passive magnetic elemeet (84,85) is provided which is influenced by the earth's magnetic field.
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 May 29, 1992 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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.