Lamp with multiple light-producing elements
CA 2446713 A1 · Owner: Shields, Alan · Inventors: Shields, Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The lamp circuit includes a power supply a main switch, and a light and , control circuit all serially connected the light and control circuit , comprising the following elements connected in parallel:a) a first lightproducing element capable of producing light of a first type and serially connected to a first switch member;b) a second light-producing element capable of producing light of a second type and serially connected to a second switch member; andc) a control circuit member selectively commanding either one of the first switch member, the second switch member and both the first and second switch members to be closed upon the main switch closing the lamp circuit, the first and …
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 May 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2023.
- 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.