Domestic to international collect call blocking
CA 2447717 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 method and device (100) for preventing fraud in collect calls from a domestic origin point (120) to an international terminating point (160) through a long-distance telecommunications system is described. In the system and method, a screening for international calls database (170) is added to the call processing system platform (150). The screening of international calls database (170) contains records keyed by country codes and each record has a , blocked collect call field using the destination numbers that are blocked from receiving collect calls. When a domestic-to-international collect call is made, the record corresponding to the country code of the international terminating …
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 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.