Inventor
NAGAO AKIHIDE
JP15 patents
⚠️ This page may combine multiple inventors who share the name “NAGAO AKIHIDE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
JFE STEEL CORP
13 patentsUS7648597B2Jan 19, 2010
Method for manufacturing high tensile strength steel plate
JFE STEEL CORP8 citations82
US10106875B2Oct 23, 2018
Steel material, hydrogen container, method for producing the steel material, and method for producing the hydrogen container
JFE STEEL CORP6 citations72
US10093998B2Oct 9, 2018
Abrasion resistant steel plate having excellent low-temperature toughness and method for manufacturing the same
JFE STEEL CORP4 citations72
US11788687B2Oct 17, 2023
Method of manufacturing pressure accumulator
JFE STEEL CORP1 citations62
US10837602B2Nov 17, 2020
Hydrogen storage tank
JFE STEEL CORP1 citations62
US10697036B2Jun 30, 2020
Steel material for composite pressure vessel liner and steel pipe or tube for composite pressure vessel liner
JFE STEEL CORP1 citations62
US10253385B2Apr 9, 2019
Abrasion resistant steel plate having excellent low-temperature toughness and hydrogen embrittlement resistance and method for manufacturing the same
JFE STEEL CORP1 citations62
US12351896B2Jul 8, 2025
Steel material for high-pressure hydrogen gas environment, steel structure for high-pressure hydrogen gas environment, and methods for producing steel material for high-pressure hydrogen gas environment
JFE STEEL CORP0 citations61
US12222069B2Feb 11, 2025
High-pressure hydrogen tank
JFE STEEL CORP0 citations51
US11982644B2May 14, 2024
Life estimation apparatus for accumulator and life extension method for pressure accumulator
JFE STEEL CORP0 citations51
US8357252B2Jan 22, 2013
High tensile strength steel having favorable delayed fracture resistance and method for manufacturing the same
JFE STEEL CORP0 citations51
US12203602B2Jan 21, 2025
Hydrogen supply system
JFE STEEL CORP0 citations47
US10295453B2May 21, 2019
Gas-phase hydrogen permeation test device and method of protecting gas-phase hydrogen permeation test device
JFE STEEL CORP0 citations40