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Seki; Akihiko
Saku, JP
No. of patents:

Patent Number Title Of Patent Date Issued
6127039 Magnetic recording medium and a process for producing the same October 3, 2000
A magnetic recording medium comprising a non-magnetic base having on at least one side a non-magnetic layer (undercoat) containing electron beam-curable resins which in turn is over-laid with a magnetic layer (topcoat) containing an iron (Fe) based magnetic powder, said magnetic laye
5712028 Magnetic recording medium January 27, 1998
A magnetic recording medium includes a flexible substrate, an undercoating layer formed on the substrate, and a magnetic layer formed on the undercoating layer. The undercoating layer contains a binder and nonmagnetic particles having an average particle size in the range of 0.01 to
5670245 Magnetic recording medium comprising a magnetic layer containing ferromagnetic metallic powder, September 23, 1997
Disclosed is a magnetic recording medium which comprises a non-magnetic support and a magnetic layer formed thereon and containing at least ferromagnetic metallic powder, and the medium contains an aliphatic acid, wherein average existence ratios of elements in terms of the number of
5576075 Method for production of magnetic recording medium November 19, 1996
This invention concerns a method for producing a magnetic recording medium by passing a magnetic coating material comprising a ferromagnetic powder and a binder resin through an ultrasonic treating device under the operating conditions of 10 to 200 kHz of frequency of oscillation and 10
5496622 Magnetic recording medium comprising an underlayer containing .alpha.-iron oxide powder and a ma March 5, 1996
Disclosed is a magnetic recording medium which comprises a non-magnetic support and a layer containing .alpha.-iron oxide powder as a lower layer and a layer containing ferromagnetic powder as an upper layer which are provided on the non-magnetic support in this order from a side of the

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