Fasteners with multi-tiered recesses and drivers with multi-tiered driving tips
CA 2619782 C · Owner: Hart, Renee Johnson · Inventors: Gemes, Gary A.; Henly, John W.; Hart, Renee Johnson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastener (20a) includes a threaded shank (26a) connected to a head (28a) . A composite recess (30) is in the head, and the composite recess is open at the end of the head that is distant from the shank. The composite recess includes superimposed first and second recesses (32,34) that are each configured for being drivingly engaged by a tip of a driver. The length of the second recess (34) is greater than the length of the first recess (32) . The tip of the driver includes superimposed tiers that are for simultaneously drivingly engaging within the composite recess of the fastener. The superimposed tiers includes first and second tiers, and the length of the second tier can be …
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 August 16, 2006 and granted June 16, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.