Interface circuit for data transmission between a microprocessor system and a time-division-multiplexed system
CA 2019586 C · Owner: Tarleton, George K. · Inventors: Tarleton, George K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The circuit of the present invention provides a signal which allows data to be transferred between a first synchronous system to a second synchronous system. The first system is a Time-Division-Multiplexing (TDM) system and the second system is a Microprocessor system. The transfer is allowed after three or four memory cycles of the Microprocessor system after receiving the end of time slot signal. This invention requires that the Microprocessor system access the Time-Division-Multiplexed system as an Input/Output (I/O) device.
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 June 21, 1990 and granted August 27, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 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.