Inventor

OKADA SENRI

JP5 patents

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

NIPPON CONCRETE IND CO LTD

2 patents

US4084782AApr 18, 1978

Split mould for making tapered concrete poles

NIPPON CONCRETE IND CO LTD10 citations70

US3989221ANov 2, 1976

Form structure for use in the making of columnar or the like concrete products

NIPPON CONCRETE IND CO LTD5 citations53

HITACHI LTD

2 patents

US3977868AAug 31, 1976

Nitrogen containing additive for strengthening cast iron

HITACHI LTD4 citations55

US4996402AFeb 26, 1991

Method and apparatus for continuously melting material by induction heating

HITACHI LTD6 citations54

HITACHI METALS LTD

1 patent

US6126713AOct 3, 2000

Additive for use in producing spheroidal graphite cast iron

HITACHI METALS LTD24 citations89