P

Inventor

KITAMURA TAKEHIKO

JP11 patents
⚠️ This page may combine multiple inventors who share the name “KITAMURA TAKEHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SUMITOMO HEAVY INDUSTRIES

5 patents
US5018962AMay 28, 1991

Injection molding die apparatus for use in the production of substrate of optical disk

SUMITOMO HEAVY INDUSTRIES26 citations88
US5501592AMar 26, 1996

Mold having opposed offset cooling channels

SUMITOMO HEAVY INDUSTRIES9 citations73
US5417899AMay 23, 1995

Injection compression molding method for compact discs or the like

SUMITOMO HEAVY INDUSTRIES15 citations73
US5098281AMar 24, 1992

Injection mold capable of shearing film gate within mold

SUMITOMO HEAVY INDUSTRIES14 citations73
US4979891ADec 25, 1990

Mold for molding optical disk base

SUMITOMO HEAVY INDUSTRIES18 citations73

MATSUYAMA PETROCHEMICALS INC

3 patents
US4327226AApr 27, 1982

Process and apparatus for producing aromatic dicarboxylic acids

MATSUYAMA PETROCHEMICALS INC82 citations94
US4062654ADec 13, 1977

Apparatus for continuous liquid-phase oxidation reaction

MATSUYAMA PETROCHEMICALS INC61 citations94
US4159307AJun 26, 1979

Apparatus for producing aromatic dicarboxylic acids

MATSUYAMA PETROCHEMICALS INC24 citations81

MITSUI PETROCHEMICAL IND

1 patent
US5354517AOct 11, 1994

Process for the preparation of substrates for optical disk

MITSUI PETROCHEMICAL IND7 citations73

SEIKO GIKEN KK

1 patent
US5693348ADec 2, 1997

Disc molding die

SEIKO GIKEN KK7 citations71

MARUZEN OIL CO LTD

1 patent
US4189603AFeb 19, 1980

Process for producing high-quality terephthalic acid suitable for use in direct polymerization

MARUZEN OIL CO LTD4 citations61