Communication method and apparatus
CA 2182809 A1 · Owner: Smith, Richard Douglas Lane · Inventors: Smith, Richard Douglas Lane; Besset, Jean-Benoit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A facsimile interface apparatus is connected between facsimile terminals communicating via a satellite. The interface apparatus converts a conventional facsimile signal to a signal suitable for transmission to the satellite. However the interface apparatus and the satellite may incur a long delay such that the calling facsimile terminal repeats a transmitted signal while the response to that signal is being received over the satellite. To overcome this problem, the facsimile interface apparatus connected to the calling terminal sends, after a period t1 a holding, signal to the calling terminal to prevent the calling, terminal from repeating the transmitted signal. After a further period t2, …
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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 July 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2016.
- 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.