Bit oriented digital switch and general digital switch for pcm transmission systems
CA 2106391 C · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Ghisler, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described is a bit oriented digital switch comprising means for controlled change of bit position and PCM word of chosen bits and bit groups in PCM words received by the switch. The switch is suitable to combine with a conventional word oriented switch to allow flexible switching of both entire PCM words and parts thereof. The switch also makes it possible to define a digital PCM transmission system, in which PCM words can contain one or several traffic channels and in which traffic channels that occupy a bit group containing at least one bit, but not an entire PCM word, dynamically are allocated necessary space at an arbitrary available location in PCM words.
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 January 29, 1993 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2015.
- 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.