Inventor
MATSUYAMA IWAO
12 patents
Patents
12 patentsUS4317668AMar 2, 1982
Method for producing silica glass
HITACHI LTD61 citations95
US4426216AJan 17, 1984
Process for producing optical glass
HITACHI LTD39 citations92
US4323381AApr 6, 1982
Method for producing mother rods for optical fibers
HITACHI LTD36 citations92
US4019915AApr 26, 1977
Method of producing optically transparent ceramics
HITACHI LTD34 citations92
US4324576AApr 13, 1982
Method for producing optical glass
HITACHI LTD22 citations81
US4259101AMar 31, 1981
Method for producing optical fiber preform
HITACHI LTD15 citations73
US5034243AJul 23, 1991
Method for magnetic orientation of magnetic recording medium using Meissner effect of high Tc superconductor
HITACHI LTD8 citations72
US4119886AOct 10, 1978
Pulse generator
HITACHI LTD17 citations72
US5180616AJan 19, 1993
Hard disk magnetic recording medium comprising magnetic powder and a binder and having a specified magnetic layer thickness and surface roughness
HITACHI LTD3 citations62
US5856281AJan 5, 1999
Bearing and manufacturing method of bearing, and magnetic disk device with bearing containing a lubricating grease
HITACHI LTD3 citations57
US5180608AJan 19, 1993
Process for producing a rigid magnetic disk by longitudinally generating standing waves or interference waves in an undried applied magnetic paint
HITACHI LTD1 citations51
US5028496AJul 2, 1991
Magnetic coated recording medium and method of manfacturing the same
HITACHI LTD1 citations51