Masako Takeuchi
13Patents
5h-index
19Co-inventors
63Inventor score
Filing activity: Sep 10, 1991 → Mar 15, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5200288A | Electrostatic developing toner with hydroxyaromatic carboxylic acid additive | Physics | 12 | Expired |
| US8178215B2 | Organic compound containing at least two carbazolyl-substituted phenyl structures; charge-transporting material and organic el element containing the compound | Emerging Cross-Sectional Technologies | 9 | Active |
| US7777043B2 | Compound, charge transporting material and organic electroluminescent element | Electricity | 6 | Active |
| US5385799A | Toner for development of electrostatic image | Physics | 6 | Expired |
| US8168307B2 | Organic compound, charge transport material and organic electroluminescent device | Emerging Cross-Sectional Technologies | 5 | Active |
| US8022617B2 | Organic compound, charge-transporting material, composition for charge-transporting material and organic electroluminescent device | Electricity | 5 | Active |
| US5629124A | Charge controlling agent for electrostatic image development, and toner and charge-imparting material employing it | Physics | 4 | Expired |
| US5166030A | Electrostatic image-developing toner containing a quaternary ammonium charge controlling agent | Physics | 4 | Expired |
| US5231173A | Disazo metal chelate compounds for optical recording media | Physics | 3 | Expired |
| US8877355B2 | Monoamine compound, charge-transporting material, and organic electroluminescent device | Emerging Cross-Sectional Technologies | 2 | Active |
| US5545502A | Electrostatic image-developing toner | Physics | 1 | Expired |
| US5721084A | Charge controlling agent for electrostatic image development, and toner and charge-imparting material employing it | Physics | 1 | Expired |
| US8427046B2 | Monoamine compound, charge-transporting material, and organic electroluminescent device | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.