Digital-to-analog communication device and method
CA 2235521 C · Owner: Motorola Mobility Llc · Inventors: Humblet, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for communication between a digital adapter (5) connected to an exchange (4) via a digital interface (7) particularly an ISDN interface, and , an analog adapter (6) connected to an exchange (3) via an analog interface (8). Said exchanges (3, 4) are interconnected via a telecommunications network (2). The device comprises means (11, 12; 15 16) for directly linking the , digital adapter (5) and the analog adapter (6). Digital data from the digital adapter (5) is transmitted in digital form to the analog adapter (6) and vice , versa, without emulating an analog signal.
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 October 23, 1996 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2018.
- 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.