Remote tracking system particularly for moving picture cameras and method
CA 2084201 C · Owner: Gvbb Holdings S.A.R.L. · Inventors: Daber, Richard P.; Parker, Jeffrey L.; Sorrells, David F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The system includes a, mobile remote unit (12) sensitive to infrared (IR) signals, (13) transmitted by a base or stationary unit (11) and an IR, transmitter (41-43) which is placed behind a rotating lens, (82) whose position at any time is known with precision, resulting in an elongated IR signal (13) that is being, "scanned" across an area in a direction substantially, perpendicular to the elongated direction of the beam (13). The, remote unit (12) detects when the peak strength of the signal, (13) occurs and provides this data via an RF signal (14) to, the base unit (11) wherein the exact effective angle between, the axis of the IR signal (13) and the remote unit (12), creates an error …
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 31, 1991 and granted November 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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.