Stefan Engel
17Patents
6h-index
26Co-inventors
66Inventor score
Filing activity: May 29, 1996 → Nov 15, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7612125B2 | Ink and method of using the ink | Performing Operations; Transporting | 36 | Active |
| US5935310A | Ink for changeable color applications | Chemistry; Metallurgy | 21 | Expired |
| US5917512A | Cleaning container and method for cleaning a printhead of an ink jet printer | Performing Operations; Transporting | 15 | Expired |
| US5888284A | Water-based inks and ink sets and use thereof | Chemistry; Metallurgy | 12 | Expired |
| US7122820B2 | Method for determining visibility, amount of precipitation and type of precipitation | Physics | 9 | Expired |
| US7286249B2 | Printer or other automatic printing system with additional control device and control device therefor | Performing Operations; Transporting | 7 | Expired |
| US8851649B2 | UV ink jet printing ink composition | Chemistry; Metallurgy | 6 | Active |
| USD530740S1 | Ink cartridge | General | 6 | Expired |
| US8333832B2 | Pigment preparation and ink jet printing ink | Emerging Cross-Sectional Technologies | 6 | Active |
| US8735461B2 | Printing ink, in particular ink-jet ink, containing pearlescent pigments based on fine and thin substrates | Chemistry; Metallurgy | 6 | Active |
| US6610130B2 | Aqueous ink set and its use | Chemistry; Metallurgy | 4 | Expired |
| US10727755B2 | Method for controlling a switch module based on thyristor switching elements | Electricity | 0 | Active |
| US8608843B2 | Pigment preparation and ink jet printing ink | Emerging Cross-Sectional Technologies | 0 | Active |
| US10675182B2 | Hollow needle for an ophthalmic surgical instrument | Human Necessities | 0 | Active |
| US9151360B2 | Metal connection plate of a chain link of an energy chain | Electricity | 0 | Active |
| US6884287B2 | Ink base for pigmented inks, inks manufactured therefrom and their use | Chemistry; Metallurgy | 0 | Expired |
| US9825532B2 | Current control for DC-DC converters | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.