| 6528989 |
AC magnetic tracker for operation close to metallic objects |
— |
2003-03-04 |
| 5953683 |
Sourceless orientation sensor |
Vladimir F. Kogan |
1999-09-14 |
| 5831260 |
Hybrid motion tracker |
— |
1998-11-03 |
| 5767669 |
Magnetic field position and orientation measurement system with dynamic eddy current rejection |
Westley S. Ashe |
1998-06-16 |
| 5744953 |
Magnetic motion tracker with transmitter placed on tracked object |
— |
1998-04-28 |
| 5742394 |
Optical 6D measurement system with two fan shaped beams rotating around one axis |
— |
1998-04-21 |
| 5045843 |
Optical pointing device |
— |
1991-09-03 |
| 4858203 |
Omnidirectional distance measurement system |
— |
1989-08-15 |
| 4823170 |
Line of sight measuring system |
— |
1989-04-18 |
| 4776016 |
Voice control system |
— |
1988-10-04 |
| 4653102 |
Directional microphone system |
— |
1987-03-24 |
| 4642786 |
Method and apparatus for position and orientation measurement using a magnetic field and retransmission |
— |
1987-02-10 |
| 4622644 |
Magnetic position and orientation measurement system |
— |
1986-11-11 |
| 4618822 |
Displacement sensing device utilizing adjustable tuned circuit |
— |
1986-10-21 |
| 4576481 |
Passive optical position measurement system |
— |
1986-03-18 |
| 4506354 |
Ultrasonic position detecting system |
— |
1985-03-19 |