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| Number | Title | Issue Date |
| 7563522 | Magnetic recording medium The present invention provides a magnetic recording medium comprising a magnetic layer with excellent surface smoothness, which comprises a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm that is ideal for short wavelength recording, and displ... | 07/21/2009 |
| 7550212 | Tape-shaped recording medium, and apparatus and method for processing the same Disclosed are a magnetic tape capable of being wound regularly, and an apparatus and a method by which the tape is wound regularly. The tape-shaped recording medium, which includes a tape-shaped support body and a recording layer being formed on a surface of the sup... | 06/23/2009 |
| 7452616 | Leader tape and magnetic tape cartridge using the same A leader tape where an non-magnetic under layer that contains a powder and a binder and a magnetic upper layer are sequentially laminated on at least one face of a support, in which F5 values of the support in a machine direction (MD) and in a transverse dire... | 11/18/2008 |
| 7384700 | Leader tape and magnetic tape cartridge using the same A leader tape comprising a support and a coating layer containing powder and a binder, wherein at least one surface of the leader tape has a center line average surface roughness (Ra) of from 10 to 60 nm, and depression hardness (DH) defined by the following equatio... | 06/10/2008 |
| 7368188 | Magnetic recording medium A magnetic recording medium including a polymer support having thereon at least one magnetic layer containing a ferromagnetic metal powder having an average major axis length of from 20 to 100 nm or a ferromagnetic hexagonal ferrite powder having an average tabular ... | 05/06/2008 |
| 7267896 | Magnetic tape and magnetic tape cartridge A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the... | 09/11/2007 |
| 7157163 | Magnetic recording medium The present invention provides a magnetic recording medium comprising a magnetic layer with excellent surface smoothness, which comprises a thin film magnetic layer of thickness in a range from 0.03 to 0.30 μm that is ideal for short wavelength recording, and displ... | 01/02/2007 |
| 6989203 | Magnetic recording medium The present invention provides a magnetic recording medium which can record both digital and analog signals by, e.g., VTR for commercial use and improve their electromagnetic conversion characteristics. A magnetic recording medium comprises a nonmagnetic support, an... | 01/24/2006 |
| 6972158 | Magnetic recording medium The present invention provides a magnetic recording medium which can record both digital and analog signals by, e.g., VTR for commercial use and improve their electromagnetic conversion characteristics. A magnetic recording medium comprises a nonmagnetic support, an... | 12/06/2005 |
| 6667119 | Magnetic recording medium comprising magnetic layers, the coercive force thereof specifically related to saturation magnetic flux density A magnetic recording medium having on a support at least two magnetic layers that include an uppermost magnetic layer for recording information and a lower magnetic layer for recording servo signals, wherein the uppermost magnetic layer has a coercive for... | 12/23/2003 |
| 5532041 | Magnetic recording media and method for making them A magnetic recording medium records two or more signals having different frequency bands by frequency multiplex recording. The non-magnetic substrate includes a first magnetic layer and a second magnetic layer on that order, said second magnetic layer hav... | 07/02/1996 |
| 5518804 | Magnetic recording medium In a magnetic recording medium comprising a nonmagnetic substrate, a first magnetic layer, and a second magnetic layer mounted in this order, the first magnetic layer has a greater coercive force and a lower residual flux density than the second magnetic ... | 05/21/1996 |
| 5494732 | Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation A magnetic recording medium having a nonmagnetic supporting member and a plurality of magnetic layers formed on at least one major surface of the nonmagnetic supporting member, comprising a first longitudinally oriented magnetic layer having a first longi... | 02/27/1996 |
| 5480685 | Method of making a magnetic recording medium comprising two magnetic layers A magnetic recording medium is made by applying a coating mixture having magnetic particles dispersed in a binder and drying the coating mixture so as to produce a coding layer containing tamper-proof identifier coding information comprising designed patt... | 01/02/1996 |
| 5215803 | Magnetic recording medium There is disclosed a magnetic recording medium having improved output levels of electromagnetic conversion properties and reduced rubbing noise. The recording medium copmprises an uppermost magnetic layer and a lower magnetic layer, wherein a thickness of... | 06/01/1993 |
| 5215833 | Magnetic recording medium A magnetic recording medium is disclosed. The medium comprises a non-magnetic support and, provided thereon, plural magnetic layers comprising the uppermost magnetic layer having a thickness of 1.5 μm or less and lower magnetic layers, said plural magnet... | 06/01/1993 |
| 5188907 | Magnetic recording medium A magnetic recording medium is disclosed which is excellent in video and audio signal output as well as in S/N ratio. The recording medium comprises first and second magnetic layers provided on a support in this order from said support and the first magne... | 02/23/1993 |
| 5162146 | Magnetic recording medium having a plurality of magnetic layers and a specified relationship of bending stiffness A magnetic recording medium is disclosed which is improved in the durability thereof. The recording medium has a support and plurality of magnetic layers formed thereon, which layers contain a ferromagnetic powder and binder. A bending stiffness of the me... | 11/10/1992 |
| 5139865 | Magnetic recording medium A magnetic recording medium comprising a non-magnetic support having thereon a plurality of magnetic layers each comprising a ferromagnetic powder dispersed in a binder, wherein the layer located within a thickness of 0.5 μm from an uppermost surface of ... | 08/18/1992 |
| 5098773 | Magnetic recording medium A magnetic recording medium having at least two magnetic layers is disclosed, comprising first and second mangetic layers which are successively formed in order on a nonmagnetic support, wherein a coercive force (Hc) of said second magnetic layer is 5×10... | 03/24/1992 |
| 5066534 | Magnetic recording medium A magnetic recording medium having excellent properties is disclosed. The recording medium comprises a non-magnetic support and provided thereon at least two magnetic layers, wherein the lower magnetic layer of the at least two layers has a Young's modulu... | 11/19/1991 |
| 5051291 | Magnetic recording medium A magnetic recording medium is disclosed. The medium comprises a non-magnetic support and, provided thereon in order, a first magnetic layer and a second magnetic layer each containing a magnetic material and a binder. Rmax, a maximum roughness, and Ra, a... | 09/24/1991 |
| 4857388 | Magnetic recording medium A magnetic recording medium comprises a nonmagnetic support and a magnetic recording layer provided on the support which comprises two layers including a first magnetic recording layer and a second magnetic recording layer. Each of the two magnetic record... | 08/15/1989 |
| 4784895 | Magnetic recording medium and process for the preparation of the same A magnetic recording medium comprising a nonmagnetic support, a first magnetic recording layer and a second magnetic recording layer, superposed in order, wherein: a coercive force of the second magnetic recording layer is in the range of 400 to 2,000 Oe,... | 11/15/1988 |
| 4781965 | Magnetic recording medium A magnetic recording medium is described, comprising a non-magnetic support having coated thereon a non-magnetic layer and a magnetic layer in that order, with the surface roughness of the surface of the support on the side opposite from the magnetic laye... | 11/01/1988 |
| 4664975 | Magnetic recording media comprising an antistatic agent-containing resin layer provided between a support and a magnetic recording layer A magnetic recording medium is disclosed which comprises a support, a non-magnetic resin layer formed on at least one side of the support and made of a mixture of an antistatic agent and a resin binder, and a magnetic recording layer formed on said non-ma... | 05/12/1987 |
| 4624883 | Magnetic recording medium A magnetic recording medium which comprises a first magnetic layer on a base and a second magnetic layer over the first magnetic layer, the second magnetic layer containing magnetic particles having an average particle length (long axis diameter) of not m... | 11/25/1986 |
| 4554606 | Magnetic recording medium A magnetic recording medium having two magnetic layers, which comprises an upper magnetic layer and a lower magnetic layer, said lower magnetic layer having a coercive force of at least 100 oersteds, preferably 100 to 500 oersteds, lower than that of the ... | 11/19/1985 |
| 4429024 | Method of making antistatic magnetic recording tapes and recording tapes The invention provides a novel means for solving and overcoming the problems in the magnetic recording tapes caused by the accumulation of static electricity during travelling of the tape affecting the quality of the reproduced sounds and picture images b... | 01/31/1984 |
| 4410603 | Magnetic recording medium A magnetic recording medium for perpendicular magnetic recording comprises a low coercive force material, and a magnetic recording layer which is formed on the low coercive force layer and has magnetic anisotropy perpendicular to the surface of said low c... | 10/18/1983 |
| 4410590 | Magnetic recording medium A magnetic recording medium comprises a lower magnetic layer containing a magnetic powder having a coercive force of 700 Oe or higher dispersed in an organic binder which is coated on a non-magnetic substrate and an upper magnetic layer containing a magne... | 10/18/1983 |
| 4410583 | Ferromagnetic recording medium A magnetic recording medium having a base, a first magnetic layer formed on the base, and a second magnetic layer formed on the first magnetic layer. The magnetic recording medium further comprises a third magnetic layer which does not contain a binder fo... | 10/18/1983 |
| 4367263 | Magnetic recording medium A magnetic recording medium comprises a first magnetic layer containing magnetite or a cobalt doped magnetite which is coated on a non-magnetic substrate; and a second magnetic layer coating a cobalt doped γ-Fe2 O3 which is coated o... | 01/04/1983 |
