Per K. Hansen
16Patents
15h-index
2Co-inventors
64Inventor score
Filing activity: Sep 30, 1982 → Mar 21, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4776016A | Voice control system | Physics | 484 | Expired |
| US5744953A | Magnetic motion tracker with transmitter placed on tracked object | Human Necessities | 323 | Expired |
| US5767669A | Magnetic field position and orientation measurement system with dynamic eddy current rejection | Mechanical Engineering; Lighting; Heating | 321 | Expired |
| US5831260A | Hybrid motion tracker | Human Necessities | 312 | Expired |
| US4642786A | Method and apparatus for position and orientation measurement using a magnetic field and retransmission | Physics | 310 | Expired |
| US5045843A | Optical pointing device | Physics | 309 | Expired |
| US5953683A | Sourceless orientation sensor | Physics | 288 | Expired |
| US5742394A | Optical 6D measurement system with two fan shaped beams rotating around one axis | Physics | 259 | Expired |
| US4622644A | Magnetic position and orientation measurement system | Physics | 167 | Expired |
| US4653102A | Directional microphone system | Electricity | 93 | Expired |
| US4506354A | Ultrasonic position detecting system | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4618822A | Displacement sensing device utilizing adjustable tuned circuit | Human Necessities | 51 | Expired |
| US4823170A | Line of sight measuring system | Physics | 39 | Expired |
| US4576481A | Passive optical position measurement system | Physics | 37 | Expired |
| US6528989B1 | AC magnetic tracker for operation close to metallic objects | Physics | 22 | Expired |
| US4858203A | Omnidirectional distance measurement system | Emerging Cross-Sectional Technologies | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.