Data transmission arrangement
CA 2008574 C · Owner: Alphanet Technology Corporation · Inventors: Gordon, Alastair T.; Reichmann, Michael H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved data transmission system which uses the telephone system for transmitting information between data transmitting/receiving devices via a process intermediary is taught whexein at least some of the data transmitting/ receiving devices can be actuated by a non-telephone actuation signal controlled by the process intermediary. Telephone number addresses are obtained by the process intermediary and assigned to uniquely identify non-telephone actuatable data transmitting/receiving devices. The telephone number addresses when used to transmit data to the assigned data transmitting/receiving device results in the transmitted data being received by the process intermediary and forwarded …
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 January 25, 1990 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 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.