Flash light screwdriver
CA 2035552 A1 · Owner: Kwan, Tak-Wah · Inventors: Kwan, Tak-Wah
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
SCREWDRIVER, A screwdriver has a front portion (1) and a handle portion (2), the front portion accommodating a holder (3) into which one of a plurality of interchangeable screwdriver heads (4) is releasably mounted for use. A light (7) operable by a switch (13) is arranged to illuminate an area around the mounted screwdriver head. The interior of the handle portion (2) is partitioned to form a central compartment (12) for accommodating a battery for supplying power to the light (7) and a plurality of other compartments (15) around the central compartment (12) for storing the interchangeable heads (4) when not mounted in the holder (3).
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 February 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 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.