Construction block
CA 1307675 C · Owner: Bender, David C. · Inventors: Bender, David C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A construction block adapted to interact with other like blocks comprises a body substantially in the shape of a rectangular parallelepiped having a front face a rear face, a top face, a, bottom face and a pair of side faces. The bottom face has a plurality of substantially identical grooves formed therein parallel, with the front face, and extending across the bottom face from one side face to the other. These grooves are of generally constant cross-section and are spaced apart evenly between the front face and the rear face of the block. The top face of the block is provided with at least two ridges thereacross parallel with the, grooves, and each receivable within a groove of a like …
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
- Granted September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
- 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.