Converting between signaling formats in an optical virtual private network (ovpn)
CA 2800487 C · Owner: Nippon Telegraph And Telephone Corporation · Inventors: Yamanaka, Naoaki; Okamoto, Satoru; Katayama, Masaru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An OVPN user register an L-1 signal type information which is used in the user's device in an OVPN terminating device in advance together with an IP address and a VPNID which are allocated to the user's device. Registered contents are notified to other OVPN terminating devices which control the same VPNID as that of the user's device. Otherwise when a calling connection request arrives from the user's device the registered contents are notified to other OVPN terminating devices which control the devices which receive the notification. By doing this it is possible to handle a request by the user for changing the setting for the signal format which is employed in the user's device quickly. …
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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 December 4, 2003 and granted September 15, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2025.
- 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.