P

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 patents
US5645652AJul 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

IMATION CORP

1 patent