Two-wire loop electric circuit arrangement
CA 1306772 C · Owner: Williams, Timothy David Neil · Inventors: Williams, Timothy David Neil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Two-Wire Loop Electric Circuit Arrangement The arrangement includes a loop (3) in which in use a signal current flows; a supply voltage generation circuit (1); a signal current conversion circuit (2); switch means (5) operative to connect either the supply voltage generation circuit or the signal current conversion circuit into the loop at any instant, the outputs of the supply voltage generation circut and the signal current conversion circuit being supplied to a common load (4) which controls operation of the switch means (5); and a pair of capacitors (6, 7) connected across the outputs of the supply voltage generation circuit and the signal current conversion circuit respectively.
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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 2009.
- 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.