Masato Kawai
39Patents
13h-index
54Co-inventors
84Inventor score
Filing activity: Nov 24, 1981 → Dec 23, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6916358B2 | Adsorbent for separating nitrogen from mixed gas of oxygen and nitrogen | Emerging Cross-Sectional Technologies | 66 | Expired |
| US4754215A | Self-diagnosable integrated circuit device capable of testing sequential circuit elements | Physics | 66 | Expired |
| US6048509A | Gas purifying process and gas purifying apparatus | Emerging Cross-Sectional Technologies | 63 | Expired |
| US5561641A | Underwater detection system for determining carrier frequencies of signals arriving from a wide area | Physics | 54 | Expired |
| US5144945A | Portable oxygen-enriching air inhaler | Performing Operations; Transporting | 49 | Expired |
| US5701245A | Suspension control system | Performing Operations; Transporting | 43 | Expired |
| US4894830A | LSI chip with scanning circuitry for generating reversals along activated logical paths | Physics | 39 | Expired |
| US4916087A | Method of manufacturing a semiconductor device by filling and planarizing narrow and wide trenches | Electricity | 34 | Expired |
| US5015272A | Adsorptive separation process | Emerging Cross-Sectional Technologies | 34 | Expired |
| US6471749B1 | Gas purification method | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5704964A | Pressure swing adsorption process | Performing Operations; Transporting | 21 | Expired |
| US10363172B2 | Ophthalmic laser treatment apparatus | Human Necessities | 16 | Active |
| US4424581A | Logic circuit with a test capability | Physics | 14 | Expired |
| US5079188A | Method for the production of a semiconductor device | Electricity | 12 | Expired |
| US4696006A | Method of generating test patterns for logic network devices | Physics | 11 | Expired |
| US7300497B2 | Gas separating method | Chemistry; Metallurgy | 10 | Expired |
| US6923844B2 | Gas separation method and device | Performing Operations; Transporting | 7 | Expired |
| US6955711B2 | Method and system for separating gas | Performing Operations; Transporting | 7 | Expired |
| US6589493B2 | Gas purification-treating agents and gas purifying apparatuses | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6767386B2 | Method and apparatus for producing nitrogen | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6660240B1 | Gas processing agent and manufacturing method therefor, gas purification method, gas purifier and gas purification apparatus | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5985003A | Oxygen production process by pressure swing adsorption separation | Chemistry; Metallurgy | 5 | Expired |
| US6824588B2 | Apparatus and method for purifying air used in cryogenic air separation | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6752851B2 | Gas separating and purifying method and its apparatus | Performing Operations; Transporting | 4 | Expired |
| US7897541B2 | Thermosensitive recording medium | Performing Operations; Transporting | 4 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.