Hierholzer, Jr.; Frank J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hierholzer, Jr.; Frank J..The latest application filed is for "silicon carbide resistance element".
- Hierholzer, Jr.; Frank J. - Florissant MO
| Patent | Date |
|---|---|
| Silicon carbide resistance element Grant 4,443,361 - Hierholzer, Jr. , et al. April 17, 1 | 1984-04-17 |
| Silicon carbide heating elements Grant 4,433,233 - Hierholzer, Jr. , et al. February 21, 1 | 1984-02-21 |
| Method for producing improved silicon carbide resistance elements Grant 4,426,405 - Hierholzer, Jr. , et al. January 17, 1 | 1984-01-17 |
| Silicon carbide shapes and method of producing them Grant 4,125,756 - Hierholzer, Jr. , et al. November 14, 1 | 1978-11-14 |
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