Transmission line branching device
CA 2000583 C · Owner: Uchida, Akira · Inventors: Yomogida, Toshihiko; Uchida, Akira; Nakamura, Hisanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A branching device to send out data received at an arbitrary one of three terminals thereof through the other two terminals. In the device, the terminals are coupled to each other by means of photo-couplers. The head of a data block received by each receiver connected with each terminal is detected, and after such detection of the head, a signal which specifies the length of the data block is generated. Thus, after communication data are received by way of an arbitrary one of the terminals, reception of communication data by way of the other two terminals is inhibited while transmission of the communication data is enabled in response to the signal specifying the data block detected. Since …
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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 October 12, 1989 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 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.
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.