Zierer; Donald R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Zierer; Donald R..The latest application filed is for "devices and methods for protecting exposed pipe ends during construction".
- Zierer; Donald R. - St. Charles IL
| Patent | Date |
|---|---|
| Devices and methods for protecting exposed pipe ends Grant 7,836,645 - Zierer , et al. November 23, 2 | 2010-11-23 |
| Devices and methods for protecting exposed pipe ends during construction Grant 7,464,507 - Zierer December 16, 2 | 2008-12-16 |
| Devices and methods for protecting exposed pipe ends during construction App 20060096195 - Zierer; Donald R. | 2006-05-11 |
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