Howlett; Donald L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Howlett; Donald L..The latest application filed is for "method to selectively affect permeability in a reservoir to control fluid flow".
- Howlett; Donald L. - Kingwood TX
- Howlett; Donald L. - Houston TX
| Patent | Date |
|---|---|
| Method to selectively affect permeability in a reservoir to control fluid flow Grant 5,396,955 - Howlett March 14, 1 | 1995-03-14 |
| Method and apparatus for establish the orientation of tools in a cased borehole Grant 5,351,755 - Howlett October 4, 1 | 1994-10-04 |
| Method and apparatus for cross-well seismic surveying Grant 5,042,611 - Howlett August 27, 1 | 1991-08-27 |
| Seismic amplifier means and method Grant 4,727,521 - Meyer , et al. February 23, 1 | 1988-02-23 |
| Streamer cable multiplexing apparatus Grant 4,528,650 - Howlett , et al. July 9, 1 | 1985-07-09 |
| Digital seismic telemetry system Grant 4,112,412 - Howlett September 5, 1 | 1978-09-05 |
| Means and method for recording seismic signals Grant 4,064,480 - Howlett December 20, 1 | 1977-12-20 |
| Wide dynamic range amplifier system with slew rate control Grant 3,919,657 - Howlett , et al. November 11, 1 | 1975-11-11 |
| Amplifier System Grant 3,688,250 - Howlett August 29, 1 | 1972-08-29 |
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