Akira Usami
19Patents
5h-index
39Co-inventors
66Inventor score
Filing activity: Nov 26, 1975 → Sep 30, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4289130A | Absorbent material for sanitary products | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4949034A | Method for contactless evaluation of characteristics of semiconductor wafers and devices | Physics | 28 | Expired |
| US4360022A | Sanitary napkin | Human Necessities | 27 | Expired |
| US5196786A | Method for inspecting an electronic state of a surface of a semiconductor substrate and an apparatus therefor | Physics | 14 | Expired |
| US7718014B2 | Low alloy steel and weld joint thereof excellent in corrosion resistance to hydrochloric acid and sulfuric acid | Chemistry; Metallurgy | 8 | Active |
| US10335689B2 | Non-transitory computer readable recording medium, game control method, server device, and information processing system | Human Necessities | 5 | Active |
| US7731896B2 | Low alloy steel and weld joint thereof excellent in corrosion resistance to hydrochloric acid and sulfuric acid | Chemistry; Metallurgy | 5 | Expired |
| US6236285A | Lumped element circulator having a plurality of separated operation bands | Electricity | 3 | Expired |
| US5820819A | Steel for chimney or gas duct, excellent in pitting resistance and rust adhesion | Chemistry; Metallurgy | 3 | Expired |
| US4039808A | Solid state ionization chamber of silicon PN-junction type | Emerging Cross-Sectional Technologies | 2 | Expired |
| US10967280B2 | Non-transitory computer readable recording medium, game control method, server device, and information processing system | Human Necessities | 1 | Active |
| US10343073B2 | Non-transitory computer readable recording medium, game control method, server device, and information processing system | Human Necessities | 1 | Active |
| US11491405B2 | Non-transitory computer readable recording medium, game control method, server device, and information processing system | Human Necessities | 1 | Active |
| US8500924B2 | High-strength steel plate and producing method therefor | Chemistry; Metallurgy | 1 | Active |
| US12053706B2 | Non-transitory computer readable recording medium, game control method, server device, and information processing system | Human Necessities | 0 | Active |
| US8361245B2 | Steel excellent in resistance to sulfuric acid dew point corrosion | Chemistry; Metallurgy | 0 | Expired |
| US5591392A | Steel plate having good corrosion resistance to condensed water | Chemistry; Metallurgy | 0 | Expired |
| US7875130B2 | Crude oil tank comprising a corrosion resistant steel alloy | Chemistry; Metallurgy | 0 | Active |
| US7922838B2 | Crude oil tank fabricated from steel plate | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.