Inventor

ASAHI HITOSHI

JP38 patents

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

ASAHI HITOSHI

NIPPON STEEL CORP

High strength line pipe steel having low yield ratio and excellent in low temperature toughness

High-strength steel pipe excellent in formability and burst resistance

Corrosion resisting steel and corrosion resisting oil well pipe having high corrosion resistance to carbon dioxide gas

Steel having improved toughness in welding heat-affected zone

Martensitic stainless steel having excellent hot workability and sulfide stress cracking resistance

Weldable high strength steel having excellent low temperature toughness

Super-high-strength line pipe excellent in low temperature toughness and production method thereof

Welded steel pipe for high strength line pipe superior in low temperature toughness and method of production of the same

UOE steel pipe excellent in collapse strength and method of production thereof

High-strength steel pipe excellent in low temperature toughness and toughness at weld heat-affected zone

Oil country tubular goods excellent in collapse characteristics after expansion and method of production thereof

Steel pipe excellent in formability and method of producing the same

Steel having excellent outer surface SCC resistance for pipeline

Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same

UOE steel pipe excellent in collapse strength and method of production thereof

Steel plates for ultra-high-strength linepipes and ultra-high-strength linepipes having excellent low-temperature toughness and manufacturing methods thereof

EXXONMOBIL UPSTREAM RES CO

Ultra-high strength, weldable steels with excellent ultra-low temperature toughness

Method for producing ultra-high strength, weldable steels with superior toughness

Ultra-high strength, weldable, boron-containing steels with superior toughness

Ultra-high strength, weldable, essentially boron-free steels with superior toughness

HARA TAKUYA

High strength thick welded steel pipe for line pipe superior in low temperature toughness and method of production of the same

High strength steel pipe for line pipe superior in low temperature toughness and high strength steel plate for line pipe and methods of production of the same

High strength steel plate and high strength welded pipe excellent in ductile fracture characteristic and methods of production of same

ASAHI HITOSHI

High-strength steel sheet and high-strength steel pipe excellent in deformability and method for producing the same

Steel pipe excellent in deformation characteristics and method of producing the same

Steel plate or steel pipe with small occurrence of Bauschinger effect and methods of production of same

PANASONIC CORP

Objective lens, optical pick-up device, and optical disk device

Objective lens, optical pick-up device, and optical disk device

Objective lens, optical pick-up device, and optical disk device

FUJISHIRO TAISHI

High-strength welded steel pipe and method for producing the same

High strength steel plate, steel pipe with excellent low temperature toughness, and method of production of same

SAWAMURA MITSURU

Oil country tubular goods with dual phase structure and producing method thereof

Electric resistance welded oil country tubular goods and manufacturing method of electric resistance welded oil country tubular goods

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Objective lens, optical pick-up device, and optical disk device

HAMATANI HIDEKI

Method of production of electric resistance welded steel pipe and high Si or high Cr electric resistance welded steel pipe

TSURU EIJI

High strength welded steel tube superior in hydrogen embrittlement cracking resistance of weld metal and method of production of same

NIPPON STEEL & SUMITOMO METAL CORP

High strength steel pipe for line pipe superior in low temperature toughness and high strength steel plate for line pipe and methods of production of the same

NAGAI KENSUKE

High-strength steel pipe and producing method thereof