Expired Canadian patentCanada
Rapid polling method for digital communications network
CA 913744 A · Owner: Western Electric Company, Incorporated · Inventors: John D. Bridwell; Donald V. Wadsworth
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 October 31, 1972. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 31, 1989.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedOctober 31, 1972
Term endedOctober 31, 1989
Patent numberCA 913744 A
Classification (IPC)H04J3/00 +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.