Foreground subject-identifying apparatus
CA 1160721 A · Owner: Tokyo Shibaura Denki Kabushiki Kaisha · Inventors: Ohyama, Masumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A foreground subject-identifying apparatus includes a signal transmitter for sending forth microwave question signals; a code signal generator for emitting a code signal in response to a question signal delivered from the signal transmitter; and signal-receiving device for interpreting code signal received from the code signal generator. The signal transmitter intermittently generates a microwave check signal in a first operation mode, and sends forth a microwave question signal in a second operation mode. The code signal generator sends forth an output signal in response to a check signal delivered from the signal transmitter, and then the signal receiver causes …
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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 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.