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Patent applications and USPTO patent grants for Spies; Brian R..The latest application filed is for "method and apparatus for cancelling powerline noise in geophysical electromagnetic exploration".
Patent | Date |
---|---|
Method and apparatus for cancelling powerline noise in geophysical electromagnetic exploration Grant 4,996,484 - Spies February 26, 1 | 1991-02-26 |
Transient electromagnetic method for detecting irregularities on conductive containers Grant 4,990,851 - Spies * February 5, 1 | 1991-02-05 |
Method of reducing noise in a borehole electromagnetic telemetry system Grant 4,980,682 - Klein , et al. December 25, 1 | 1990-12-25 |
Transient electromagnetic method for detecting irregularities on conductive containers Grant 4,929,898 - Spies May 29, 1 | 1990-05-29 |
Transient electromagnetic method for detecting corrosion on conductive containers Grant 4,843,320 - Spies June 27, 1 | 1989-06-27 |
Transient electromagnetic method for directly detecting corrosion on conductive containers Grant 4,839,593 - Spies June 13, 1 | 1989-06-13 |
Method of reducing noise in electromagnetic geophysical exploration data Grant 4,837,514 - Spies June 6, 1 | 1989-06-06 |
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