Expired Canadian patentCanada
An integrated services director (isd) overall architecture
CA 2235690 C · Owner: Gerszberg, Irwin · Inventors: Wallace, Edward L.; Gerszberg, Irwin; Russell, Jesse Eugene
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 video enable answering machine having many new features including customized video announcement messages caller ID based video announcement messages and time based video announcement messages.
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 April 23, 1998 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 23, 1998
GrantedAugust 7, 2001
Term endedApril 23, 2018
Patent numberCA 2235690 C
Classification (IPC)H04M7/00 +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.