Johnson; Emil S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Johnson; Emil S..The latest application filed is for "method for flaw location in a magnetizable pipeline by use of magnetic markers positioned outside of said pipeline".
- Johnson; Emil S. - Houston TX
| Patent | Date |
|---|---|
| Method for flaw location in a magnetizable pipeline by use of magnetic markers positioned outside of said pipeline Grant 3,967,194 - Beaver , et al. June 29, 1 | 1976-06-29 |
| Pipeline inspection device with pivotal support structure Grant 3,949,292 - Beaver , et al. April 6, 1 | 1976-04-06 |
| Magnetic flux leakage inspection method and apparatus including magnetic diodes Grant 3,899,734 - Beaver , et al. August 12, 1 | 1975-08-12 |
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