Foreground subject-identifying apparatus
CA 1069606 A · Owner: Tokyo Shibaura Electric Co. · Inventors: Sakuragi, Johji; Kimura, Yoshinori; Kamata, Shohichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foreground subject-identifying apparatus comprises a sweep signal generator for issuing a sweep signal having frequencies fs falling within a prescribed range; a carrier wave generator for producing a carrier wave having a frequency f0; a first frequency mixer for mixing output signals from the sweep signal generator and carrier wave generator to generate an output signal having a frequency f0+fs; a first antenna through which to transmit an output signal from the first frequency mixer; a second antenna mounted on the foreground subject to receive an output signal sent forth from the first antenna; a coding circuit carried on the foreground subject which is provided with a plurality of …
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.