Variable length called number screening
CA 2448530 A1 · Owner: Springer, Arthur Lance · Inventors: Springer, Arthur Lance; Marchand, Dean C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system (100) for preventing telecommunications fraud comprising a database (114) and fraud control center (118) having at least one processor to receive and store numbers representing terminating ANIs in the database (114) that have generated a fraud alert, to check the database (114) to determine if the dialed terminating ANI matches a stored number. The stored numbers include at least a portion of the terminating ANI and at least one variable length character, and are accessible to block subsequent calls directed at the respective terminating ANIs. The at least one variable length character also matches one or more or any corresponding or subsequent characters in the dialed …
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 May 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2024.
- 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.