Patents
US 9568632 B2: Practical electromagnetic gradiometer
- Granted
- 2017-02-14
- Filed
- 2014-09-04 application 14477090
- Type
- Utility · 10 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An electromagnetic gradiometer (EMG) survey kit includes a lightweight man-carry boom about ten feet long. Matched magnetic dipole antennas are attached at each end and connected to a differential EMG receiver able to make measurements in the picoTelsa range. A pair of staging tripods allow the man-carry boom to be prepared for field use and assist the user in positioning themselves under a shoulder sling. An air core transmitter loop antenna and a low frequency square wave generator are spotted nearby a survey on the ground surface. Its emissions will illuminate any underground conductive structures with primary electric field waves. These in turn will reradiate near field magnetic waves that can be detected by the EMG receiver while walking around in a search area on the ground surface. GPS navigation receivers are used to locate and log the changing positions of the EMG receiver and stationary loop transmitter.
Source: PVGPATDIS, file of 2026-04-10 (ipg170214.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Stolar, Inc. 17 patents | US company or organization | Raton, NM | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gerald L. Stolarczyk | Santa Fe, NM | 10 | PVGPATDIS, file of 2026-04-10 | |
| Tito Sanchez | Rio Rancho, NM | 3 | PVGPATDIS, file of 2026-04-10 | |
| Chance Dain Valentine | Raton, NM | 3 | PVGPATDIS, file of 2026-04-10 | |
| Ernest M. Salazar | Rio Rancho, NM | 2 | PVGPATDIS, file of 2026-04-10 | |
| Beaux L. Beard | Rio Rancho, NM | 2 | PVGPATDIS, file of 2026-04-10 | |
| John G. Howard | Rio Rancho, NM | 2 | PVGPATDIS, file of 2026-04-10 | |
| Brecken H. Uhl | Las Cruces, NM | 11 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01V | Geophysics; gravitational measurements; detecting masses or objects; tags | G01V3/12 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.