Electric adjuster
CA 2191480 C · Owner: Imoto, Nariisa · Inventors: Imoto, Nariisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric adjuster is designed to permit an a.c. power supply or an a.c. signal as an input to be arbitrarily adjusted or converted with high efficiency and outputted. The ratio of windings of a transformer can be arbitrarily adjusted or continuously adjusted. If the number of primary coils is 6, as a first example, the electric adjuster includes a transformer (3) having a secondary coil (37) and a plurality of primary coils (31), (32) (33), (34), (35) and, (36) whose ratios of windings to the secondary coil (37) are 1, 2, 4, 8, 16 and 32, respectively, and a coil switching operation section (2) that switches the combinations of the primary coils (31) to (36) using a plurality of switches …
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 24, 1995 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2017.
- 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.