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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7296478 | Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the t... | 11/20/2007 |
| 7227717 | Asymmetric disk surface properties in one head disk drives A disk drive for storing data includes a drive housing and an asymmetrical storage disk. The storage disk includes a body region, a first side region, and an opposed second side region. The side regions are asymmetrical relative to the body region. Various structure... | 06/05/2007 |
| 7094484 | Master carrier for magnetic transfer, inspecting method thereof, and magnetic recording medium producing method In a master carrier for magnetic transfer which comprises a support that has a transfer-recording pattern arrayed in the track direction thereof in accordance with the information to be transferred to a magnetic recording medium, and a magnetic layer formed on the t... | 08/22/2006 |
| 7083871 | Single-sided sputtered magnetic recording disks An information-storage media is provided that includes: (a) a substrate disk 312 having first and second opposing surfaces; (b) a first selected layer 304 on the first surface, the first selected sele... | 08/01/2006 |
| 5061537 | Magnetic disk comprising a flexible substrate and a plastic film each having a specified Young's modulus and which meet specified thickness relationships A magnetic disk comprising an annular flexible substrate and a magnetic layer on at least one substrate major surface is provided with a plastic film ring or a pair of plastic film rings along the outer periphery of the disk. The ring is adhesively secure... | 10/29/1991 |
| 4742420 | Magnetic disk with a porous substrate A magnetic recording disk having a rigid substrate disc is provided with an annular air gap defined between inner and outer peripheral bonding rings. A flexible disc sheet having a recording surface is placed over the arrangement and held tight against th... | 05/03/1988 |
| 4742421 | Magnetic recording disc having tensioned and elastically-supported recording surface A magnetic recording disc having a rigid substrate disc is provided with an annular recess defined between inner and outer peripheral bonding rings. An annular elastic disc having a thickness slightly larger than the depth of the recess is placed therein.... | 05/03/1988 |
| 4725470 | Magnetic disk medium A magnetic disk medium having a magnetic layer formed on its substrate, is characterized in that in a portion of the substrate where a magnetic head runs is formed a concave groove in which a cushion material is provided, whereby the contact pressure appe... | 02/16/1988 |
| 4623570 | Stable stretched surface recording medium Stretched surface recording disk (SD) 10 comprises an annular support 12 having raised annular ridges 42 and 28 at its inside and outside diameters 22 and 30 with a base portion 24 in between the two ridges, and an annular recording medium film 14 held in... | 11/18/1986 |
| 4609964 | Reinforcement for magnetic recording disk A magnetic disk reinforcement member in which in adhesive layer is spaced from the peripheral edges of the reinforcement member to preclude exuding of the adhesive beyond the peripheral edges as a result of forces applied to the reinforcement member and t... | 09/02/1986 |
