Pratt; David W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Pratt; David W..The latest application filed is for "dual function bailer".
- Pratt; David W. - Clearwater FL
- Pratt; David W. - Palm Harbor FL
| Patent | Date |
|---|---|
| Bottom-emptying device for tapered bailer Grant 7,255,380 - Pratt August 14, 2 | 2007-08-14 |
| Bailer having built-in filter Grant 6,989,092 - Pratt January 24, 2 | 2006-01-24 |
| Dual function bailer Grant 6,979,033 - Pratt December 27, 2 | 2005-12-27 |
| Self-emptying bailer Grant 6,966,587 - Pratt November 22, 2 | 2005-11-22 |
| Dual Function Bailer App 20050099030 - Pratt, David W. | 2005-05-12 |
| Dual function bailer Grant 6,846,028 - Pratt January 25, 2 | 2005-01-25 |
| Apparatus for inhibiting contamination of sample during bailer emptying Grant 6,669,255 - Pratt December 30, 2 | 2003-12-30 |
| Apparatus for inhibiting contamination of sample during bailer emptying App 20030160469 - Pratt, David W. | 2003-08-28 |
| Air-tight bailer system Grant 6,601,889 - Pratt August 5, 2 | 2003-08-05 |
| Air-tight bailer system App 20030075940 - Pratt, David W. | 2003-04-24 |
| Multiple Check Valve Bailer App 20030070499 - Pratt, David W. | 2003-04-17 |
| Dual function bailer App 20020185878 - Pratt, David W. | 2002-12-12 |
| Controlled Slow Descent Bailer App 20020104648 - Pratt, David W. | 2002-08-08 |
| Bailer having leak-inhibiting seal Grant 6,135,523 - Pratt October 24, 2 | 2000-10-24 |
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