Arrangement for signal transmission between a transmitting station and a receiving station
CA 2175639 C · Owner: Endress + Hauser Gmbh + Co. · Inventors: Meier, Jurgen; Wetzel, Gustav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmitting station (1) is connected to a receiving station (2) by a two-wire line (3) via which the supply current (IV) required for operating the transmitting station (1) is transferred from the receiving station (2) to the transmitting station (1). The transmitting station (1) comprises a supply circuit (13) including a voltage regulator (16) for maintaining the operating voltage of the transmitting station (1) constant and an energy store (17) for compensating current and/or voltage fluctuations. Via the two-wire line (3) an analog signal current (IS) variable between two limit values is further transferred from the transmitting station (1) to the receiving station (2) this, signal …
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
- Filed May 2, 1996 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2018.
- 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.