Trowsdale; Larry S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Trowsdale; Larry S..The latest application filed is for "borehole survey method and apparatus for drilling substantially horizontal boreholes".
- Trowsdale; Larry S. - Oklahoma City OK
| Patent | Date |
|---|---|
| Borehole survey method and apparatus for drilling substantially horizontal boreholes Grant 4,361,192 - Trowsdale November 30, 1 | 1982-11-30 |
| Method and apparatus for indicating the radioactive decay products of radium in an environment Grant 3,988,587 - Shreve, Jr. , et al. October 26, 1 | 1976-10-26 |
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