Lan tester
CA 2200729 C · Owner: Ntt Data Corporation · Inventors: Haneda, Masaji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A LAN tester for carrying out a conduction test a polarity test, and an operation test of LAN wiring includes a power supply section for supplying a power supply current to one of paired signal lines to be tested at one end thereof; a current detecting section for detecting the current flowing through the other of the signal lines; a forward polarity detecting section for detecting positive and negative pulses from positive and negative signal lines respectively; a, reverse polarity detecting section for detecting negative and positive pulses; a first change-over switch for operating the power supply section and the current detecting section in a conduction test mode and operating the …
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 July 26, 1996 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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.