Polhemus, Inc.
8Patents
0Active
8Granted
34Portfolio score
Filing activity: Jul 9, 1992 → Nov 3, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5307072A | Non-concentricity compensation in position and orientation measurement systems | Mechanical Engineering; Lighting; Heating | 306 | Expired |
| US5453686A | Pulsed-DC position and orientation measurement system | Physics | 305 | Expired |
| US5640170A | Position and orientation measuring system having anti-distortion source configuration | Physics | 226 | Expired |
| US6400139B1 | Methods and apparatus for electromagnetic position and orientation tracking with distortion compensation | Human Necessities | 83 | Expired |
| US6369564B1 | Electromagnetic position and orientation tracking system with distortion compensation employing wireless sensors | Physics | 65 | Expired |
| US6624626B2 | Method and apparatus for electromagnetic position and orientation tracking with distortion compensation employing modulated signal | Human Necessities | 39 | Expired |
| US6377041B1 | Method and apparatus for determining electromagnetic field characteristics within a volume | Physics | 28 | Expired |
| US6762600B2 | Method and apparatus for electromagnetic position and orientation tracking with distortion compensation employing a modulated signal | Human Necessities | 28 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.