Akira Doi
40Patents
14h-index
85Co-inventors
84Inventor score
Filing activity: May 20, 1981 → Jul 18, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4634600A | Surface treatment process | Chemistry; Metallurgy | 56 | Expired |
| US5938527A | Air ventilation or air supply system | Mechanical Engineering; Lighting; Heating | 55 | Expired |
| US6136386A | Method of coating polymer or glass objects with carbon films | Emerging Cross-Sectional Technologies | 46 | Expired |
| US6465057B1 | Plasma CVD method and apparatus | Electricity | 37 | Expired |
| US6564744B2 | Plasma CVD method and apparatus | Electricity | 34 | Expired |
| US6893720B1 | Object coated with carbon film and method of manufacturing the same | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6180019A | Plasma processing apparatus and method | Electricity | 31 | Expired |
| US6388382B1 | Plasma processing apparatus and method | Electricity | 31 | Expired |
| US6032730A | Heat exchanger and method of manufacturing a heat exchanging member of a heat exchanger | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5653106A | Exothermic heat generating apparatus | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4501717A | Sintering method using a plasma gas atmosphere | Chemistry; Metallurgy | 23 | Expired |
| US6833051B2 | Plasma processing apparatus and method | Electricity | 23 | Expired |
| US6756737B2 | Plasma processing apparatus and method | Electricity | 21 | Expired |
| US4425369A | Cheese-containing composition for dessert making and process for producing the same | Human Necessities | 19 | Expired |
| US5565070A | Solvent vapor sucking method and solvent recovering apparatus | Chemistry; Metallurgy | 13 | Expired |
| US5023101A | Shortening for hard butter product and process for producing hard butter product | Human Necessities | 13 | Expired |
| US4474849A | Coated hard alloys | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4383957A | Method of sintering a ceramic composition | Chemistry; Metallurgy | 10 | Expired |
| US6499424B2 | Plasma processing apparatus and method | Electricity | 10 | Expired |
| US6076598A | Opposed flow heat exchanger | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5356661A | Heat transfer insulated parts and manufacturing method thereof | Electricity | 8 | Expired |
| US6506662B2 | Method for forming an SOI substrate by use of a plasma ion irradiation | Electricity | 7 | Expired |
| US5302324A | Method for decontaminating substances contaminated with radioactivity, and method for decontaminating the materials used for said decontamination | Physics | 7 | Expired |
| US6481370B2 | Plasma processsing apparatus | Electricity | 6 | Expired |
| US4882238A | Die for use in forming lens | Chemistry; Metallurgy | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.