Telecommunications interface
CA 2504985 A1 · Owner: Sheppard, G. Linton · Inventors: Ziegler, Hans J.; Henderson, Richard E.; Zoppel, Louis V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Digital Subscriber Line (DSL) transport can be extended economically by a retrofit cabinet (132) which can replace a standard telephone cross~connect cabinet or by placement of a new cross-connect cabinet. The retrofit cabinet (132) or new cabinet incorporates within it a Digital Subscriber Line Access Multiplexer (DSLAM)(174). The inclusion of the DSLAM (174) in the same cabinet with the cross-connect blocks avoids problems associated with real estate acquisition and approvals, avoids problems resulting from crosstalk and , avoids the necessity of replacing older feeder cabling that is incapable of carrying DSL signals. With pre-wired connections between the cross-connect blocks …
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 September 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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.