Data input device
CA 2003236 A1 · Owner: Kosmach, July P. · Inventors: Kosmach, July P.; Gerasimchuk, Anatoly M.; Bardachenko, Vitaly F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for manual data input into a computer system, providing entered information transmission via a long-distance two-wire communication line while retain-, ing high speed, interference immunity and reliability characteristics, comprises a conductor switching matrix with the horizontal conductors thereof connected to first multichannel delay circuit and with the vertical conductors thereof connected to second multichannel delay circuit. Contact of probe connected to power supply with the desired node of conductor switching matrix causes generation of signals at the outputs of delay circuits, with signal delay times characterizing the coordinates of the contacted node of conductor …
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 November 17, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 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.