Multiplex interrogation system using pulses
CA 1086396 A · Owner: Denver Fire Reporter & Protective Co. Inc. · Inventors: Sprowls, Joseph B. (Iii)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
MULTIPLEX INTERROGATION SYSTEM USING PULSES" ABSTRACT OF THE DISCLOSURE, This interrogation system monitors the status of a plurality of protection zone transducers by repeatedly supplying a series of sequential interrogation pulses thereto sufficient to address and scan every transducer associated with a protection zone. Reply pulses are received from a transponder associated with a protection zone transducer and the reply pulses received over a selected number of prior sequential scans form a response pattern from which the condition of each transducer and its protection zone is determined. At least three conditions may be determined from the reply response pattern, including an alarm …
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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 September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 1997.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.