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Class Information
Number: 318/647
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With particular "error-detecting" means > With magnetic field measuring instruments
Description: Subject matter in which the error detecting means is a magnetic field measuring instrument.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7274166 |
Apparatus and method for correcting position of mobile robot |
Sep. 25, 2007 |
| 7129665 |
Control apparatus for feed driving system |
Oct. 31, 2006 |
| 7057369 |
System and device for regulating the position of a drivable component and drive therefor |
Jun. 6, 2006 |
| 6859257 |
Stage system |
Feb. 22, 2005 |
| 6781337 |
Multi-joint type industrial robot |
Aug. 24, 2004 |
| 6713981 |
Pole position detector for motor |
Mar. 30, 2004 |
| 6433503 |
Synchronous motors and control circuits therefor |
Aug. 13, 2002 |
| 6114823 |
Circuit and apparatus for sensing fluid flow |
Sep. 5, 2000 |
| 6087796 |
Method and apparatus for determining electric motor speed using vibration and flux |
Jul. 11, 2000 |
| 5926001 |
Canned motor bearing wear monitoring device |
Jul. 20, 1999 |
| 5841255 |
Flux detector system |
Nov. 24, 1998 |
| 5668456 |
Servo motor encoder |
Sep. 16, 1997 |
| 5659230 |
Brushless motor drive circuit |
Aug. 19, 1997 |
| 5545961 |
Electric motor drive |
Aug. 13, 1996 |
| 5285142 |
Wafer stage with reference surface |
Feb. 8, 1994 |
| 5150115 |
Inductive type incremental angular position transducer and rotary motion encoder having once-around index pulse |
Sep. 22, 1992 |
| 5055757 |
Automatic toriod turns counter |
Oct. 8, 1991 |
| 4952858 |
Microlithographic apparatus |
Aug. 28, 1990 |
| 4677381 |
Flux-gate sensor electrical drive method and circuit |
Jun. 30, 1987 |
| 4600883 |
Apparatus and method for determining the range and bearing in a plane of an object characterized by an electric or magnetic dipole |
Jul. 15, 1986 |
| 4409529 |
Prosthesis |
Oct. 11, 1983 |
| 4321521 |
Detection device of electronic timepiece |
Mar. 23, 1982 |
| 4321519 |
Magnetic field detection device for electronic timepiece |
Mar. 23, 1982 |
| 4321520 |
Electronic timepiece |
Mar. 23, 1982 |
| 4232451 |
Detector for sensing the angular position of a rotatable magnet |
Nov. 11, 1980 |
| 4112755 |
"Strapdown" induction compass transmitter with means to compensate for heading errors during turns and during dives and climbs due to the vertical component of the Earth's magnetic field and d |
Sep. 12, 1978 |
| 4059064 |
Marine auto pilot |
Nov. 22, 1977 |
| 3988658 |
Electromagnetic drive assembly for rotary bodies using a magnetically mounted rotor |
Oct. 26, 1976 |
| 3982165 |
Apparatus for digitizing and plotting |
Sep. 21, 1976 |
| 3952681 |
Automatic steering system for vessels with a wireless remote control and course change capability |
Apr. 27, 1976 |
| 3946691 |
Autopilot employing improved hall-effect direction sensor |
Mar. 30, 1976 |
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