Automatic meter reader with microcomputer control system
CA 2022360 C · Owner: Strobel, Donald H. · Inventors: Thornborough, Raymond J.; Pridemore, Donald F.; Strobel, Donald H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic meter reader for connection to a metering transducer and for connection to a telephone line to transmit modulated signals to a remote data receiving center. In one aspect of the invention the reader comprises: microcomputer means, a telephone interface for connecting to the telephone line and including relay means for establishing an off-hook condition of the telephone line fox transmission of modulated signals. Interconnecting means is connected to the metering transducer, the telephone interface and the microcomputer. The interconnecting means includes digital logic circuitry and is arranged to facilitate operations including the register of meter data by the microcomputer …
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 July 31, 1990 and granted September 20, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2012.
- 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.