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| Number | Title | Issue Date |
| 7960045 | Magnetic recording medium and method of manufacturing the same An aspect of the present invention relates to a magnetic recording medium comprising a coating layer on a nonmagnetic support, wherein the coating layer comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferr... | 06/14/2011 |
| 7381485 | Magnetic recording tape A magnetic recording tape comprising a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the nonmagnetic support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and a number average molecular weight of from 12,000 to... | 06/03/2008 |
| 7368189 | Magnetic recording medium A magnetic recording medium comprising: a magnetic layer containing ferromagnetic powder and a binder; a nonmagnetic support; and a back coat layer, in this order, wherein the nonmagnetic support contains polyester having an intrinsic viscosity of from 0.40 to 0.60 ... | 05/06/2008 |
| 7132164 | Hexagonal ferrite magnetic powder, method for producing the same and magnetic recording medium A hexagonal ferrite magnetic powder having an average tabular diameter of from 15 to 30 nm, a coercive force (Hc) of from 2,000 to 5,000 Oe (from 160 to 400 kA/m) and a saturated magnetization (σs) of equal to or more than the average tabular diameter (nm)×0.37+45... | 11/07/2006 |
| 7122241 | Biaxially oriented polyester film and production process therefor A biaxially oriented polyester film for a high-density magnetic recording medium, particularly a high-density magnetic recoding medium of linear recording system, which has high strength in longitudinal and transverse directions, excellent dimensional stability in a... | 10/17/2006 |
| 7092210 | Magnetic recording and reproduction method A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the tra... | 08/15/2006 |
| 6980380 | Master information carrier and method for manufacturing magnetic disk A master information carrier includes a high-level region and a low-level region that are formed on a non-magnetic base. The high-level region includes a ferromagnetic thin film pattern that corresponds to preformat information signals. The master information carrie... | 12/27/2005 |
| 5534323 | Biaxially oriented film of polyethylene-2,6-naphtalenedicarboxylate for magnetic recording floppy disks Provided are a biaxially oriented base film formed from polyethylene-2,6-naphthalenedicarboxylate as a raw material and a high-density magnetic recording floppy disk using the same. The base film and the floppy disk are characteristic in that they inhibit... | 07/09/1996 |
| 5510192 | Polyethylene naphthalate multilayered film for high density magnetic recording medium Disclosed herein is a polyethylene naphthalate multilayered film for a high density magnetic recording medium comprising: a polyethylene naphthalate layer (A), and a polyethylene naphthalate layer (B) laminated on at least one surface of said polyethylene naph... | 04/23/1996 |
| 5494739 | Polyethylene-2,6-naphthalenedicarboxylate film A biaxially oriented polyethylene-2,6-naphthalenedicarboxylate film, which can be used as a base film for a recording medium capable of high-density recording, characterized in that when h (unit: nm) stands for a height of a protrusion formed on the film ... | 02/27/1996 |
| 5415930 | Biaxially oriented, unidirectionally long polyethylene-2,6-naphthalate film and magnetic tape therefrom A biaxially oriented, unidirectionally long polyethylene-2,6-naphthalate film, (A) which contains (a) 0.05 to 0.4% by weight of first inert solid particles having an average particle diameter of 0.05 to 0.3 μm, and (b) 0.005 to 0.05% by weight of second inert... | 05/16/1995 |
| 5051292 | Biaxially oriented film of polyethylene-2,6-naphthalate A biaxially oriented film of polyethylene-2,6-naphthalate having a Young's modulus of at least 650 kg/mm2 in a given direction on the film plane and a direction crossing it at right angles, the difference between the Young's moduli in the two d... | 09/24/1991 |
| 4804736 | Polyethylene-2,6-naphthalate film for magnetic recording tapes Disclosed herein is a polyethylene-2,6-naphthalate film suitable for magnetic recording tapes and, in particular, a polyethylene-2,6-naphthalate film suitable for a base film of high-density magnetic recording tapes, having a Young's modulus of not less t... | 02/14/1989 |
| 4732799 | Polyethylene naphthalate film Disclosed herein is a biaxially oriented polyethylene naphthalate film having a center line average roughness [Ra(μm)] and a film thickness [T(μm)] which satisfy the following formula: ##EQU1## produced by the electrostatic cooling method from poly... | 03/22/1988 |
