Hans Keller
7Patents
6h-index
8Co-inventors
52Inventor score
Filing activity: Nov 22, 1974 → Sep 10, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5409524A | Membranes having improved selectivity and recovery, and process for making same | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4765314A | Device for introducing an endoscope or a surgical tool into body cavities with a feed for a flushing medium and an extractor for said flushing medium | Human Necessities | 30 | Expired |
| US3944854A | Light-emitting diode connected to a coil | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4328689A | Spring bolt combination lock | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4722128A | Loading tool | Emerging Cross-Sectional Technologies | 10 | Expired |
| US3990356A | Method of and apparatus for controlling the inlet openings of central ventilation installations | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US3939436A | Reverberation device | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.