Per Udden
7Patents
6h-index
4Co-inventors
56Inventor score
Filing activity: Jun 3, 1901 → Jul 28, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3952822A | Electrically powered wheel-chair for indoor and outdoor use | Emerging Cross-Sectional Technologies | 156 | Expired |
| US3953054A | Hand operated wheel-chair | Performing Operations; Transporting | 89 | Expired |
| US5180907A | Method and apparatus for the measurement of rapid light variation superimposed on a slowly changing background light intensity | Human Necessities | 30 | Expired |
| US4735498A | Eye movement measuring apparatus | Human Necessities | 16 | Expired |
| US4958925A | Eye movement measurement device with multiple light emitting and detecting elements | Human Necessities | 9 | Expired |
| US5606958A | Ignition system for an internal-combustion engine, particularly for use in a chain saw or the like | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5645037A | Ignition system for an internal combustion engine, particularly for use in a chain saw or the like | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.