Rolf Richter
15Patents
6h-index
29Co-inventors
66Inventor score
Filing activity: Jun 20, 1977 → Sep 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7946249B2 | Nectar feeder with float and valve | Human Necessities | 49 | Active |
| US4118447A | Aerator containing a ballast charge | Emerging Cross-Sectional Technologies | 41 | Expired |
| US6077339A | Pigment preparations useful for ink-jet printing | Chemistry; Metallurgy | 24 | Expired |
| US6245138A | Pigment preparations useful for ink-jet printing | Chemistry; Metallurgy | 20 | Expired |
| US6596446B2 | Organic pigments in color filters liquid of crystal display | Physics | 13 | Expired |
| US5104903A | Bead-form expandable styrene polymers having a high expansion capacity | Chemistry; Metallurgy | 9 | Expired |
| US8863692B2 | Nectar feeder having a float with flush stopper | Human Necessities | 5 | Active |
| US6303213A | Substrates secure against unauthorized copying and their production | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8651054B2 | Bird feeder with removable ports | Human Necessities | 3 | Active |
| US5421872A | Dyestuffs for printing inks | Chemistry; Metallurgy | 3 | Expired |
| US8863691B2 | Nectar feeder with float and valve | Human Necessities | 2 | Active |
| US9004007B2 | Nectar feeder having a float with rounded bottom | Human Necessities | 1 | Active |
| US7382444B2 | Multiple optical channels | Physics | 0 | Expired |
| US9173381B2 | Nectar feeder with float and valve | Human Necessities | 0 | Active |
| US11525677B2 | Surveying apparatus for surveying an object | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.