Frank; Berthold
Patent Applications and Registrations
Patent applications and USPTO patent grants for Frank; Berthold.The latest application filed is for "method for the hot-working of glass".
- Frank; Berthold - Aachen DT
| Patent | Date |
|---|---|
| Method for the hot-working of glass Grant 3,979,196 - Frank , et al. September 7, 1 | 1976-09-07 |
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