Inventor

MATSUMOTO KEISHI

JP22 patents

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

MATSUMOTO KEISHI

YAMAHA CORP

Optical disc apparatus with regulation of recording velocity and laser power

Optical disk recorder with reproduction quality control

Optical disc apparatus with laser power control matching linear recording velocity

Optical disc recording under adjustable conditions

Optical disc recording method and optical disc recording apparatus for setting optimal recording power to record data

NIPPON STEEL CORP

Oil-well metal pipe, and method for producing oil-well metal pipe

Method for producing chemically treated alloy material, and chemical treatment solution regeneration apparatus used in method for producing chemically treated alloy material

Oil-well metal pipe

SUMITOMO METAL IND

Threaded joint for steel pipes

Threaded joint for steel pipes

SHIMODA KAZUHIRO

Antioxidant agent and process for producing metallic material

Antioxidant agent and process for producing metallic material

NIPPON STEEL & SUMITOMO METAL CORP

Lubricant film-forming composition and screw joint for steel pipe

Threaded joint for pipes

TOYODA MASATOSHI

Drawing method of metallic tube and producing method of metallic tube using same

Methods for producing blank tube for cold drawing and for producing cold drawn tube

MATSUMOTO KEISHI

Loudspeaker apparatus and speaker system

GOTO KUNIO

Threaded joint for pipes

TOYOTA MOTOR CO LTD

Stator coil heating apparatus and stator coil heating method

NAGAREO TOMOMITSU

Photocurable composition suitable for rust prevention of a threaded joint for steel pipes

NISHIMORI JUNICHI

Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe making

KURANISHI TAKAO

Threaded joint for pipes