Phonograph actuated elements
CA 1100886 A · Owner: Tanguay, Henri · Inventors: Tanguay, Henri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A magnetizing disc for use with a phonograph having a cover positionable over a turntable and in fixed parallel relationship with the turntable. The cover of the phonograph is made of a non-magnetizable material. The disc has one or more magnets secured to an upper face thereof. A drive post is secured to the disc and engageable with the turntable to impart a rotational drive to the disc and to space the disc above the turntable whereby to cause displacement of magnetically attractable elements disposed on the cover when the turntable is rotated with the cover positioned thereover. - 1 -
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 May 12, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 1998.
- 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.