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Your search returned 25 patents.
( 428/820.5 in Current US Classification )
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Patent IDTitleDate Filed
6621787 Optical storage medium having protective layer thicker than wavelength of useable light source April 29, 1999
6463016 Magneto-optical storage medium having in-plane magnetized layers January 28, 2000
6451424 Magneto-optical recording medium and method of manufacturing the same February 2, 2000
6436524 Magneto-optical recording medium January 13, 1998
6424601 Magneto-optical recording media having an auxiliary magnetic layer November 16, 1998
6399174 Magnetooptical recording medium on which high-density information can be recorded and method of reproducing the recorded information October 13, 2000
6331338 Amorphous alloy of light rare earth-transition metal and semi-metal, magneto-optical recording layer made of the alloy, and magneto-optical disk adopting the layer October 28, 1996
6028824 Magnetooptical recording medium allowing overwriting with two or more magnetic layers May 18, 1998
6017645 Composite material for magnetooptic recording its preparation and its use February 25, 1998
5871855 Magneto-optical recording medium and method of using same January 31, 1995
5792571 Magneto-optical recording medium having large kerr rotational angle in short wavelength range January 29, 1997
5710746 Magneto-optical recording medium and reading method with magnetic layers of different coercivity December 18, 1995
5663935 Magneto-optical recording medium having two magnetic layers of exchange-coupled at ferromagnetic phase February 6, 1996
5657299 Magneto-optical recording medium January 19, 1996
5637394 Magneto-optical recording medium and method of reproducing magneto-optical information using thereof December 15, 1994
5549953 Optical recording media having optically-variable security properties April 29, 1993
5498485 Magneto-optical recording medium and manufacturing method thereof March 8, 1994
5462811 Magneto-optical recording media and mangeto-optical device using the media April 8, 1992
4883710 Magneto-optical recording medium October 28, 1987
4777082 Optical magnetic recording medium August 17, 1987
RE37719 Optical data recording system and method of production of recording medium June 21, 1994
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