Hartley; Ezra Dale
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hartley; Ezra Dale.The latest application filed is for "pressure switch with diaphragm and valve means".
- Hartley; Ezra Dale - Los Angeles CA
| Patent | Date |
|---|---|
| Pressure switch with diaphragm and valve means Grant 4,081,621 - Hartley March 28, 1 | 1978-03-28 |
| Dispenser for flowable material Grant 3,979,023 - Hartley September 7, 1 | 1976-09-07 |
| Compact Reciprocating Piston Machine Grant 3,834,840 - Hartley September 10, 1 | 1974-09-10 |
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