Donald E. Koopman
6Patents
4h-index
5Co-inventors
46Inventor score
Filing activity: Jul 31, 1975 → May 29, 1985
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4301054A | Thermographic cholesteric coating compositions | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4433637A | Microencapsulated cholesteric liquid crystal temperature measuring device for determining the temperature of non-planar or planar surfaces | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4501503A | Thermographic cholesteric coating compositions and plates | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4441508A | Thermographic cholesteric coating compositions and plates | Emerging Cross-Sectional Technologies | 8 | Expired |
| US3998860A | Solidification retardation of liquid crystalline compositions with steroid derivatives of isostearyl carbonate | Chemistry; Metallurgy | 4 | Expired |
| US4676617A | Camera system and power supply | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.