Radar, in particular for watching over premises
CA 1090452 A · Owner: Tacussel, Maurice · Inventors: Tacussel, Maurice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A homodyne type radar using the Doppler effect working by pulses, linked in order to watch over premises to an alarm device triggered in case of an intrusion in this premises, the output circuit of the pulse generator of the radar apparatus comprising a resistor linked to a capacitor at the frequency of the pulses, the load variation of this capacitor controlling the alarm. The resistor is placed in the circuit of the hyperfrequency transistor which is common to the emission and to the reception. The circuit linking the capacitor to the alarm device comprises a low-pass filter and a step-apparatus. The oscillator controlling the pulses is used to control a direct voltage into direct voltage …
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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 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.