Expired Canadian patentCanada
System activity change indicator
CA 1315348 C · Owner: Cohen, Daniel E. · Inventors: Cohen, Daniel E.
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 system for measuring changes in the number of maxima and minima occurring in a signal over time which indicate activity changes in a subject from which the signal measured emanates.
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
- Granted March 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 30, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 30, 1987
GrantedMarch 30, 1993
Term endedMarch 30, 2010
Patent numberCA 1315348 C
Classification (IPC)A61B5/04 +1 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.