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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7357996 | Magnetic recording medium, magnetic recording device, and method of manufacturing magnetic recording medium To suppress a magnetic wall movement in the structure including an amorphous magnetic layer as a recording layer, and to realize a high density recording with a sufficient signal quality level, a magnetic recording medium includes an amorphous magnetic layer (record... | 04/15/2008 |
| 7180709 | Information-storage media with dissimilar outer diameter and/or inner diameter chamfer designs on two sides A single-sided magnetic hard disk 200 is provided that includes opposing first and second sides 300 and 308 having opposing first and second chamfers 408 and 412, respectively. The first chamfer 408 is dissimilar (or differe... | 02/20/2007 |
| 5492773 | Magneto-optical recording medium A magneto-optical recording medium having an improved durability or reliability is obtained by providing a protecting layer of an alloy of titanium with one or more of chromium, rhenium and tantalum. This titanium alloy protecting layer has an improved re... | 02/20/1996 |
| 4808456 | Magneto-optical recording medium and method of making the same A magneto-optical recording medium comprises a substrate, a magneto-optical recording layer formed of a rare earth metal-transition metal alloy and a dielectric protective layer overlaid in this order on the substrate, and a rare earth metal layer overlai... | 02/28/1989 |
| 4666789 | Magneto-optic recording medium A multilayer magnetic recording medium including at least one magnetic layer (CMOI) formed of an alloy including one of the group of heavy rare earths and a metal of the group of the first series of transition metals surrounded by at least two dielectric ... | 05/19/1987 |
