Expired Canadian patentCanada
Parallel port multiplexor
CA 2107103 C · Owner: Rosen, David B. · Inventors: Rosen, David B.; Gates, Dirk I.; Matthews, James K.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiplexor for use with a computer (20) having a parallel port (22), for providing multiple separately addressable auxiliary parallel ports (60 62).
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 March 24, 1992 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 24, 1992
GrantedAugust 25, 1998
Term endedMarch 24, 2012
Patent numberCA 2107103 C
Classification (IPC)H04J3/24 +2 more
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.