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Browse by Category: Main > Electrical & Energy
Class Information
Number: 361/267
Name: Electricity: electrical systems and devices > Demagnetizing systems and processes
Description: Subject matter including systems and process for neutralizing a magnetic field.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8547086 Coercivity performance determination device for coercivity distribution magnet Oct. 1, 2013
8493062 Method for determining coercivity of coercivity distribution magnet Jul. 23, 2013
8462456 Magnetic data eraser Jun. 11, 2013
8379363 Bulk erase tool to erase a perpendicular media recording disk of a disk drive Feb. 19, 2013
8300347 Magnetic data eraser Oct. 30, 2012
8009403 Disk preconditioning apparatus and related method Aug. 30, 2011
7876519 Self-spinning disk bulk erasure for hard disk assembly Jan. 25, 2011
7710706 Apparatus and method for demagnetizing shadow mask May. 4, 2010
7652837 Data erasure apparatus and data erasure method Jan. 26, 2010
7379287 Shielding method and shielding apparatus May. 27, 2008
7345865 Magnetic guiding apparatus Mar. 18, 2008
7287313 Method for preventing magnetic damage to a GMR head during back-end processing Oct. 30, 2007
7196894 Method and a device for demagnetising objects Mar. 27, 2007
7176388 Soldering method and solder joint member Feb. 13, 2007
7164569 Mechanism for automated permanent magnet degaussing Jan. 16, 2007
7079345 Demagnetization of magnetic media for data storage device using gradually reduced magnetic field Jul. 18, 2006
7061742 Desk-top continuous-use magnetic media eraser/degausser Jun. 13, 2006
6570727 Method and apparatus for erasing information from a disk within a magnetic disk drive using an externally generated magnetic field May. 27, 2003
6316845 Battery powered AC electromagnetic yoke for magnetic particle inspection Nov. 13, 2001
6178081 Controller for electric permanent chuck Jan. 23, 2001
6160697 Method and apparatus for magnetizing and demagnetizing current transformers and magnetic bodies Dec. 12, 2000
6144544 Apparatus and method for material treatment using a magnetic field Nov. 7, 2000
6058078 Information recording disc demagnetization apparatus May. 2, 2000
6038093 Magnetic recording/reproducing apparatus with a current supplying circuit for demagnetizing residual magnetization remaining at an end of a magnetic pole Mar. 14, 2000
5995358 Demagnetizable electropermanent magnetic holder Nov. 30, 1999
5991147 Electromagnetic chuck with magnetizing/demagnetizing circuit Nov. 23, 1999
5986355 Arrangement and method for reduction of magnetic fields and use thereof Nov. 16, 1999
5969933 Transient magnet field degaussing system Oct. 19, 1999
5959824 Transient magnetic field degaussing system with auto calibration Sep. 28, 1999
5923520 Demagnetizing circuit and current limiting device Jul. 13, 1999
5901029 Method of degaussing a color cathode ray tube May. 4, 1999
5889338 Demagnetizing apparatus for an automotive engine Mar. 30, 1999
5870269 Demagnetizing circuit Feb. 9, 1999
5825604 Demagnetization circuit Oct. 20, 1998
5815361 Magnetic field shielding device in display Sep. 29, 1998
5721665 Modulated magnet field bulk degaussing system Feb. 24, 1998
5715130 Demagnetization circuit and components therefor Feb. 3, 1998
5666413 Scrambler of information stored on magnetic memory media Sep. 9, 1997
5617289 Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing Apr. 1, 1997
5574616 Degaussing technique Nov. 12, 1996
5557493 Method of adjusting linearity Sep. 17, 1996
5526221 Degaussing circuit Jun. 11, 1996
5493275 Apparatus for deactivation of electronic article surveillance tags Feb. 20, 1996
5420742 Degausser for tape with plural recorded segments May. 30, 1995
5357398 Degaussing circuit Oct. 18, 1994
5270899 Erasing apparatus Dec. 14, 1993
5189590 Closed-loop multi-sensor control system and method Feb. 23, 1993
5185688 Split core degaussing coil loop Feb. 9, 1993
5181058 Camera having magnetic head for demagnetizing and recording in demagnetization pattern Jan. 19, 1993
5170094 Magnetic field compensation apparatus Dec. 8, 1992

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