Freudendahl; Erling A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Freudendahl; Erling A..The latest application filed is for "threadless pipe coupling".
- Freudendahl; Erling A. - Galten DK
| Patent | Date |
|---|---|
| Threadless pipe coupling Grant 9,683,688 - Freudendahl June 20, 2 | 2017-06-20 |
| Threadless Pipe Coupling App 20150084329 - Freudendahl; Erling A. | 2015-03-26 |
| Pipe coupling Grant 7,789,431 - Freudendahl September 7, 2 | 2010-09-07 |
| Hydrant knock-off combination flow stop and backflow check valve Grant 7,156,119 - Freudendahl January 2, 2 | 2007-01-02 |
| Hydrant knock-off combination flow stop and backflow check valve App 20050155645 - Freudendahl, Erling A. | 2005-07-21 |
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