Digital transmission system
CA 1315904 C · Owner: Marconi Communications, Inc. · Inventors: Kimbrough, Mahlon D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital transmission system which serves a multiplicity of subscribers by a multiplicity of channel units. Each channel unit serves up to two subscribers. At each end of the system there is included a signaling, processing unit (SPU) which provides both time slot interchanging and change in format for the signaling information. At each end of the system there is, another unit (TRU) which provides time slot interchanging for the nonsupervisory information for each subscriber. The channel units are arranged in channel banks of four groups of units each. Each channel bank is connected to the SPU by two single lines over one of which all the supervisory (signaling, provisioning and testing) …
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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
- Granted April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- 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.