Masami Watanabe
61Patents
18h-index
85Co-inventors
87Inventor score
Filing activity: Jun 24, 1983 → Oct 11, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5369196A | Production process of olefin based polymers | Emerging Cross-Sectional Technologies | 102 | Expired |
| US5678402A | Air-fuel ratio control system for internal combustion engines and exhaust system temperature-estimating device applicable thereto | Emerging Cross-Sectional Technologies | 101 | Expired |
| US4814540A | Process for producing propylene oligomers | Emerging Cross-Sectional Technologies | 91 | Expired |
| US5726705A | Surface defect inspection apparatus | Physics | 64 | Expired |
| US5629398A | Process for producing cyclic olefin based polymers, cyclic olefin copolymers, compositions and molded articles comprising the copolymers | Chemistry; Metallurgy | 55 | Expired |
| US5854165A | Transition metal compound, catalyst for olefin polymerization, process for preparing olefin polymer by use of catalyst | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5171919A | Process for producing propylene based oligomers | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5955557A | Branched ethylenic macromonomer and its polymer | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5693728A | Process for producing cyclic olefin based polymers | Chemistry; Metallurgy | 38 | Expired |
| US5461127A | Polymerization catalysts and process for producing polymers | Chemistry; Metallurgy | 35 | Expired |
| US6555633B1 | Catalysts for &agr;-olefin production and processes for producing &agr;-olefin | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5391661A | Process for producing a styrenic polymer and a catalyst for use therein | Chemistry; Metallurgy | 22 | Expired |
| US6339135B1 | Transition metal compound, catalyst for olefin polymerization, process for preparing olefin polymer | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5159561A | Zero-phase sequence current detector | Physics | 21 | Expired |
| US5403908A | Aryl styrene-based copolymer | Chemistry; Metallurgy | 21 | Expired |
| US6841693B1 | Transition metal compound, olefin polymerization catalyst, and method of polymerizing olefin | Chemistry; Metallurgy | 19 | Expired |
| US5586544A | Fuel injection amount control system for internal combustion engines and intake passage wall temperature-estimating device used therein | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5648443A | Cyclic olefin copolymers, compositions and molded articles comprising the copolymers | Chemistry; Metallurgy | 18 | Expired |
| US5050411A | Shift lever locking device for automatic transmission of column type | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4529498A | Method for producing mesophase pitch | Textiles; Paper | 14 | Expired |
| US4913889A | High strength high modulus carbon fibers | Textiles; Paper | 13 | Expired |
| US6169154A | Branched ethylenic macromonomer and its polymer | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4814121A | Method for spinning a petroleum-origin mesophase | Textiles; Paper | 12 | Expired |
| US4512874A | Method for producing mesophase continuously | Chemistry; Metallurgy | 10 | Expired |
| US6171994A | Multiple crosslinking type transition metal compound used for olefin polymerization process | Emerging Cross-Sectional Technologies | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.