World time clock
CA 2039961 A1 · Owner: Darling, Dwight L. · Inventors: Darling, Dwight L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A geographical clock comprising a rotatable circular face having projected thereon a map of the world centred on the south or north pole, provided with a circumferential second time zone, a frame with a fixed first time zone, i.e. a clock scale, and central hour minute and second hands. The map distinctively shows the 24 conventional geographical time zones. The second time zone is divided in 24 even sectors. The geographical time zones and the first time zone sectors are correspondingly colour coded. In one embodiment, the map and the hour hand are rotated together by a 24 hour clock mechanism. For re/setting the time according to the selected zone of locations, a stop mechanism holds the …
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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 April 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2013.
- 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.