|
| US4373174 | 25 Nov 1980 | 8 Feb 1983 | | Method for protective magnetization of vessels |
| US5126669 | 27 Nov 1990 | 30 Jun 1992 | The United States of America as represented by the Administrator, of the National Aeronautics and Space Administration | Precision measurement of magnetic characteristics of an article with nullification of external magnetic fields |
| US5128643 | 24 Sep 1990 | 7 Jul 1992 | | Method and apparatus for producing a region of low magnetic field |
| US5225999 | 11 Oct 1990 | 6 Jul 1993 | The Trustees of the University of Pennsylvania | Magnetic environment stabilization for effective operation of magnetically sensitive instruments |
| US5365115 | 23 Jun 1992 | 15 Nov 1994 | Stevens Institute of Technology | Method and apparatus for mitigation of magnetic fields from low frequency magnetic field sources |
| US5465012 | 30 Dec 1992 | 7 Nov 1995 | | Active feedback system for suppression of alternating magnetic fields |
| US5586064 | 3 Nov 1994 | 17 Dec 1996 | The Trustees of the University of Pennsylvania | Active magnetic field compensation system using a single filter |
| US5920130 | 30 Oct 1997 | 6 Jul 1999 | ABB Research Ltd | Overhead line for electrical energy transmission |
| US5952734 | 10 Jun 1997 | 14 Sep 1999 | Fonar Corporation | Apparatus and method for magnetic systems |
| US5965956 | 30 Oct 1997 | 12 Oct 1999 | ABB Research Ltd. | Overhead line for electric energy transmission |
| US6798632 | 13 Jun 2002 | 28 Sep 2004 | The United States of America as represented by the Secretary of the Navy | Power frequency electromagnetic field compensation system |
| US6831281 | 28 Nov 2001 | 14 Dec 2004 | Nikon Corporation | Methods and devices for detecting and canceling magnetic fields external to a charged-particle-beam (CPB) optical system, and CPB microlithography apparatus and methods comprising same |
| US7428469 | 18 Oct 2005 | 23 Sep 2008 | Wacom Co., Ltd. | Three-dimensional-information detecting system and three-dimensional-information inputting device |
| US7525314 | 29 Apr 1998 | 28 Apr 2009 | | Method and device for active compensation of magnetic and electromagnetic disturbance fields |
| US7649351 | 11 Feb 2005 | 19 Jan 2010 | Elekta AB (publ) | Method for interference suppression in a measuring device |