Vector Magnetics, LLC
32Patents
7Active
32Granted
43Portfolio score
Filing activity: Apr 4, 1986 → Nov 1, 2021 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5589775A | Rotating magnet for distance and direction measurements from a first borehole to a second borehole | Physics | 291 | Expired |
| US5923170A | Method for near field electromagnetic proximity determination for guidance of a borehole drill | Physics | 247 | Expired |
| US4933640A | Apparatus for locating an elongated conductive body by electromagnetic measurement while drilling | Fixed Constructions | 246 | Expired |
| US5485089A | Method and apparatus for measuring distance and direction by movable magnetic field source | Physics | 215 | Expired |
| US5676212A | Downhole electrode for well guidance system | Fixed Constructions | 190 | Expired |
| US4700142A | Method for determining the location of a deep-well casing by magnetic field sensing | Physics | 153 | Expired |
| US5074365A | Borehole guidance system having target wireline | Fixed Constructions | 143 | Expired |
| US5218301A | Method and apparatus for determining distance for magnetic and electric field measurements | Physics | 124 | Expired |
| US5258755A | Two-source magnetic field guidance system | Fixed Constructions | 121 | Expired |
| US5512830A | Measurement of vector components of static field perturbations for borehole location | Physics | 114 | Expired |
| US5343152A | Electromagnetic homing system using MWD and current having a funamental wave component and an even harmonic wave component being injected at a target well | Fixed Constructions | 109 | Expired |
| US5657826A | Guidance system for drilling boreholes | Fixed Constructions | 104 | Expired |
| US5513710A | Solenoid guide system for horizontal boreholes | Fixed Constructions | 103 | Expired |
| US5305212A | Alternating and static magnetic field gradient measurements for distance and direction determination | Physics | 97 | Expired |
| US5725059A | Method and apparatus for producing parallel boreholes | Fixed Constructions | 95 | Expired |
| US6736222B2 | Relative drill bit direction measurement | Fixed Constructions | 94 | Expired |
| US6466020B2 | Electromagnetic borehole surveying method | Fixed Constructions | 90 | Expired |
| US6234259A | Multiple cam directional controller for steerable rotary drill | Fixed Constructions | 83 | Expired |
| US5515931A | Single-wire guidance system for drilling boreholes | Fixed Constructions | 82 | Expired |
| US4845434A | Magnetometer circuitry for use in bore hole detection of AC magnetic fields | Physics | 78 | Expired |
| USRE36569E | Method and apparatus for measuring distance and direction by movable magnetic field source | General | 64 | Expired |
| US6814163B2 | Two solenoid guide system for horizontal boreholes | Fixed Constructions | 25 | Expired |
| US6626252B1 | Two solenoid guide system for horizontal boreholes | Fixed Constructions | 23 | Expired |
| US7219749B2 | Single solenoid guide system | Fixed Constructions | 22 | Expired |
| US6939186B1 | Rolling heel, forward facing rowing system | Performing Operations; Transporting | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.