Demagnetizing device
CA 1299235 C · Owner: Fritsch, Roxanne Yvonne · Inventors: Fritsch, Joseph Frederick; Fritsch, Roxanne Yvonne; Malgat, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A demagnetizing device for demagnetizing a sound head in a cassette tape recorder, comprises a cassette type housing. A carrier member pivotal in the housing carries a permanent magnet which oscillates with the carrier member sidewardly across an opening in the housing adjacent the sound head of the cassette tape recorder to demagnetize the sound head. A cam driven by a spindle of the cassette tape recorder acting on a follower drives the carrier member with oscillating movement.
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 April 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 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.