Inventor

KIYAMA MASAO

14 patents

⚠️ This page may combine multiple inventors who share the name “KIYAMA MASAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TODA KOGYO CORP

12 patents

US5133805AJul 28, 1992

Plate-like hematite particles, a pigment comprising the same and showing a golden color, and a process for producing the same

TODA KOGYO CORP29 citations88

US4548801AOct 22, 1985

Plate-like barium ferrite particles for use in magnetic recording and process for producing the same

TODA KOGYO CORP21 citations82

US4698182AOct 6, 1987

Hexagonal plate-like barium ferrite particles for magnetic recording and process for producing the same

TODA KOGYO CORP9 citations73

US4585568AApr 29, 1986

Plate-like barium ferrite particles for magnetic recording and process for producing the same

TODA KOGYO CORP11 citations73

US4584242AApr 22, 1986

Plate-like barium ferrite particles for magnetic recording and process for producing the same

TODA KOGYO CORP16 citations73

US4561988ADec 31, 1985

Process for production of plate-like barium ferrite particles for magnetic recording

TODA KOGYO CORP9 citations73

US4539129ASep 3, 1985

Barium ferrite particles and process for producing said particles

TODA KOGYO CORP11 citations73

US4529524AJul 16, 1985

Process for producing plate-like barium ferrite particles for magnetic recording

TODA KOGYO CORP12 citations73

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

US4752407AJun 21, 1988

Process for producing plate-like barium ferrite particles

TODA KOGYO CORP3 citations62

NIPPON ELECTRIC CO

2 patents

US3963630AJun 15, 1976

Lead zirconate-titanate powder of particle sizes between 0.02 and 0.2 micron, process for producing same, and high-density piezoelectric ceramics made of powder

NIPPON ELECTRIC CO37 citations90

US4119536AOct 10, 1978

Method of disposing of a ferrous-ion containing acidic aqueous waste by forming polycrystalline iron compound particles

NIPPON ELECTRIC CO20 citations80