Fenske; Douglas H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Fenske; Douglas H..The latest application filed is for "method for increasing the brightness of limestone".
- Fenske; Douglas H. - Houston TX
| Patent | Date |
|---|---|
| Method for increasing the brightness of limestone Grant 4,239,736 - Fenske December 16, 1 | 1980-12-16 |
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