Adjustable degausser
CA 1278820 C · Owner: Seagate Technology International · Inventors: Gunter, Charlie E. Iii; Channel, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to devices which are designed to degauss magnetic read/write heads which heads are used in data or other recording on magnetic media. The recording characteristics of a head deteriorate when it has a magnetic bias and a head used to follow high density data tracks may be forced by the bias to follow to one side or the other of a data track thus risking reading failure or misplaced writings. Basically, this invention provides for a degausser which generates a sinewave which decays over time and which can vary the amplitude of that sinewave used in degaussing the sinewave frequency, and its exponential decay rate and it can vary these under software, control without …
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 January 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.