Leng; John L.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Leng; John L..The latest application filed is for "pressure relief valve".
- Leng; John L. - Havant GB2
- Leng; John L. - St. Albans GB2
| Patent | Date |
|---|---|
| Pressure relief valve Grant 5,230,364 - Leng , et al. July 27, 1 | 1993-07-27 |
| Composition and use of the composition for the extraction of metals from aqueous solution Grant 5,176,843 - Dalton , et al. * January 5, 1 | 1993-01-05 |
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