Inventor

YOSHIHARA NAO

JP18 patents

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

YOSHIHARA NAO

KOBE STEEL LTD

Spring steel superior in workability

Steels for high-strength springs excellent in cold workability and quality stability

Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereof

Non-heat treated wire or bar steel for springs

High-strength steel wire material exhibiting excellent cold-drawing properties, and high-strength steel wire

Steel wire for cold-formed spring excellent in corrosion resistance and method for producing the same

High-strength steel with excellent unsusceptibility to hydrogen embrittlement

Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting

High-strength steel material having excellent fatigue properties

Steel wire material for spring and its producing method

Spring wire rod excelling in fatigue characteristics

High-strength spring steel wire with excellent hydrogen embrittlement resistance, manufacturing process therefor, and high-strength spring

YOSHIHARA NAO

Spring steel with excellent resistance to hydrogen embrittlement and steel wire and spring obtained from the steel

Spring steel wire excellent in fatigue characteristic and wire drawability

Cold formable spring steel wire excellent in cold cutting capability and fatigue properties and manufacturing process thereof

OURA HIROSHI

High carbon steel wire rod having excellent drawability

High-carbon steel wire excellent in wire drawability and fatigue property after wiredrawing

ISHIDA TOMONOBU

Steel wire rod for high-strength spring excellent in wire drawability, manufacturing method therefor, and high-strength spring