Inventor
OTA YASUTAKA
JP18 patents
⚠️ This page may combine multiple inventors who share the name “OTA YASUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TODA KOGYO CORP
17 patentsUS5645652AJul 8, 1997
Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same
TODA KOGYO CORP29 citations92
US5156922AOct 20, 1992
Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same
TODA KOGYO CORP25 citations91
US5531922AJul 2, 1996
Granulated particles for magnetic particles for magnetic recording, and process for producing the same
TODA KOGYO CORP33 citations90
US6753084B2Jun 22, 2004
Spindle-shaped magnetic alloy particles for magnetic recording, and magnetic recording medium
TODA KOGYO CORP7 citations73
US5599378AFeb 4, 1997
Spindle-shaped magnetic iron based alloy particles and process for producing the same
TODA KOGYO CORP6 citations72
US5466306ANov 14, 1995
Spindle-shaped magnetic iron based alloy particles
TODA KOGYO CORP11 citations72
US5137783AAug 11, 1992
Acicular magnetic metal particles containing iron as main ingredient and process for producing the same
TODA KOGYO CORP17 citations72
US4851292AJul 25, 1989
Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same
TODA KOGYO CORP8 citations72
US4806429AFeb 21, 1989
Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same
TODA KOGYO CORP5 citations72
US4781981ANov 1, 1988
Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same
TODA KOGYO CORP9 citations72
US7172642B2Feb 6, 2007
Magnetic metal particles containing iron as main component, process for producing the same and magnetic recording medium using the same
TODA KOGYO CORP2 citations62
US6447618B1Sep 10, 2002
Magnetic acicular alloy particles containing iron as a main component
TODA KOGYO CORP2 citations62
US5989516ANov 23, 1999
Spindle-shaped geothite particles
TODA KOGYO CORP4 citations62
US5968226AOct 19, 1999
Process of making goethite or iron-based alloy particles
TODA KOGYO CORP4 citations62
US4752407AJun 21, 1988
Process for producing plate-like barium ferrite particles
TODA KOGYO CORP3 citations62
US5238483AAug 24, 1993
Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same
TODA KOGYO CORP2 citations61
US6682813B2Jan 27, 2004
Magnetic acicular alloy particles containing iron as a main component
TODA KOGYO CORP0 citations51