Inventor
KOYANAGI YOSHIHIKO
JP10 patents
⚠️ This page may combine multiple inventors who share the name “KOYANAGI YOSHIHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DAIDO STEEL CO LTD
7 patentsUS12492457B2Dec 9, 2025
Precipitation hardening martensitic stainless steel
DAIDO STEEL CO LTD0 citations58
US11732331B2Aug 22, 2023
Ni-based alloy, and Ni-based alloy product and methods for producing the same
DAIDO STEEL CO LTD0 citations57
US10385426B2Aug 20, 2019
Ni-based superalloy
DAIDO STEEL CO LTD1 citations54
US12188113B2Jan 7, 2025
Austenitic stainless steel and hydrogen resistant member
DAIDO STEEL CO LTD0 citations50
US10689723B2Jun 23, 2020
Ferritic stainless steel and heat-resistant member
DAIDO STEEL CO LTD0 citations49
US10526689B2Jan 7, 2020
Heat-resistant Ti alloy and process for producing the same
DAIDO STEEL CO LTD0 citations45
US12577645B2Mar 17, 2026
Non-magnetic austenitic stainless steel material and production method therefor
DAIDO STEEL CO LTD0 citations41