Gregg; David P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Gregg; David P..The latest application filed is for "method and apparatus for reducing plunger seal wear on automatic casing swab lift systems".
- Gregg; David P. - New Philadelphia OH
- Gregg; David P. - Culver City CA
- Gregg; David P. - Los Angeles CA
| Patent | Date |
|---|---|
| Method and apparatus for reducing plunger seal wear on automatic casing swab lift systems Grant 6,637,515 - Bishop , et al. October 28, 2 | 2003-10-28 |
| Method and apparatus for reducing plunger seal wear on automatic casing swab lift systems App 20020170718 - Bishop, Ronald C. ; et al. | 2002-11-21 |
| Optical tape duplicator Grant 5,563,867 - Gregg October 8, 1 | 1996-10-08 |
| Shock-resistant, electrostatically actuated pick-up for optical recording and playback Grant 5,521,452 - Gregg May 28, 1 | 1996-05-28 |
| Gas and oil well interface tool and intelligent controller Grant 5,253,713 - Gregg , et al. October 19, 1 | 1993-10-19 |
| Method for manufacturing a second surface optical storage device Grant 5,017,414 - Gregg May 21, 1 | 1991-05-21 |
| Process for making a video record disc Grant 4,615,753 - Gregg October 7, 1 | 1986-10-07 |
| Process for making a video record disc Grant 4,500,484 - Gregg February 19, 1 | 1985-02-19 |
| Process for making video discs Grant 4,342,714 - Gregg , et al. August 3, 1 | 1982-08-03 |
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