|6501728||Optical disc having groove and land tracks|
An over-writable magneto-optical recording medium in which a recording section has at least a first dielectric layer, a first recording layer, a second recording layer, and a second dielectric layer formed sequentially and a reflective layer and a protect...
|6268043||Magnetic recording medium|
A magnetic recording medium which is capable of improving durability and reliability while satisfactory electromagnetic conversion characteristics are being maintained, the magnetic recording medium incorporating a non-magnetic support member; and a magne...
|5997987||Magnetic recording medium|
This invention intends to offer a magnetic recording medium which is so devised as to give a wide dynamic range and a flat response over whole audible frequencies. This invention attains the object by providing a magnetic recording medium which has two ma...