Image display system
CA 2463245 A1 · Owner: Shikama, Shinsuke · Inventors: Wadaka, Shuso; Shikama, Shinsuke; Suzuki, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An image display system, comprising a transmission means (10) having an illuminating light source system formed of a light emitting body (11) a , parabolic mirror (12), and a condensing lens (13) and a light bulb (14) for injecting light coming from the illuminating light source system after receiving image information, a projection optical means (20) having a refractive optical lens (21) for projecting the light from the transmission means (10) and a convex mirror (22) for extendedly projecting by reflecting the light from the refractive optical lens (21) by a reflective surface with a negative power, and a display means (30) for receiving the light from the projection optical …
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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 November 7, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2024.
- 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.