Hollow, perforated, round ball
CA 1062739 A · Owner: Astrom, Karl G. · Inventors: Astrom, Karl G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a ball which is round, and constructed like a shell The shell consists of a regular, continuous pattern comprising the very body of the ball. The pattern has its character from a great number of substantially symmetrical holes in the shell, the total surface of the holes being at least 20% of the total limiting surface of the ball. This bail will travel more softly in the air and is very little disturbed by wind conditions at outdoor play.
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 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
- 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.