Haruo Doi
21Patents
10h-index
46Co-inventors
75Inventor score
Filing activity: Oct 22, 1974 → Jan 16, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4472538A | Composite material composed of clay mineral and organic high polymer and method for producing the same | Emerging Cross-Sectional Technologies | 103 | Expired |
| US4661316A | Heat-resistant alloy based on intermetallic compound TiAl | Chemistry; Metallurgy | 49 | Expired |
| US4435512A | Process for producing cordierite ceramic products | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4824262A | Unlubricated sliding member | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4003976A | Converter for the purification of exhaust gases | Emerging Cross-Sectional Technologies | 24 | Expired |
| US3967230A | Resistor built-in spark plug | Electricity | 20 | Expired |
| US5762894A | Process for producing composite oxide powder containing cerium and zirconium | Chemistry; Metallurgy | 19 | Expired |
| US4697325A | Method for joining ceramic parts to metallic parts | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4384989A | Semiconductive barium titanate | Electricity | 15 | Expired |
| US4497869A | Formed product of vermiculite and method for producing the same | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5352337A | Method for reducing nitrogen oxides | Performing Operations; Transporting | 9 | Expired |
| US4486235A | Clay mineral sheet | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4521236A | Method for preparation of porous glass film | Chemistry; Metallurgy | 9 | Expired |
| US4987106A | Process for producing clay mineral of chain structure | Chemistry; Metallurgy | 7 | Expired |
| US4673587A | Method of producing a composite ceramic body | Chemistry; Metallurgy | 7 | Expired |
| US4678678A | Method of strengthening ceramics | Chemistry; Metallurgy | 7 | Expired |
| US4645115A | Method of bonding ceramic article | Chemistry; Metallurgy | 7 | Expired |
| US4774103A | Method of reinforcing a ceramic body of silicon carbide | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4483839A | Process for producing silicon nitride | Chemistry; Metallurgy | 6 | Expired |
| US5686377A | Catalyst for purifying exhaust gases | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5542992A | Tial base alloy having high strength performance at high temperature | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.