A ratchet screwdriver with illumination function
CA 2271233 A1 · Owner: Chang, Chen-Chi · Inventors: Chang, Chen-Chi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ratchet screwdriver With illumination function including a hollow main body in which an illumination device is disposed. A front end of the main body is fixedly connected with a transparent housing in which a ratchet sleeve is installed. By using a non-circular hole which has a shape for complementarily engaging with a ratchet seat the ratchet seat, is closer to the illumination device. Accordingly when the, light projected from the illumination device is focused at the front end of the sleeve, the base seat will not block the light and in use of the ratchet screwdriver an illumination, function can be achieved.
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 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2021.
- 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.