Method of testing connecting and/or switching devices and/or lines
CA 2006367 A1 · Owner: Karpovsky, Mark Girsh · Inventors: Karpovsky, Mark Girsh; Levitin, Lev Berovich; Matt, Hans Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
P 38 43 564.0, ABSTRACT, A method of testing connecting and/or switching devices particularly of a space-division multiplex switching matrix (K) in which one or more of a plurality of input lines (Di Cj) is, connectable with one or more of a plurality of output lines (Yk) and which is carried out to check the formation of a check word is described. A first check word PB1 and also according to the, same rules of formation from the signals on the output lines (Yk), an additional check word PB2 are derived continuously from the signals on the input lines (Di, Cj). The two check words are compared to each other. In case of a disagreement an error, indication is provided. (Figure 3) H. J. Matt …
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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 21, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2011.
- 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.