Dittrich; Erich
Patent Applications and Registrations
Patent applications and USPTO patent grants for Dittrich; Erich.The latest application filed is for "ring rolling mill".
- Dittrich; Erich - Dortmund DE
- Dittrich; Erich - Bremen DT
| Patent | Date |
|---|---|
| Ring rolling mill Grant 4,339,937 - Strugala , et al. July 20, 1 | 1982-07-20 |
| Method for manufacturing annular metal workpieces Grant 4,084,419 - Dittrich , et al. April 18, 1 | 1978-04-18 |
| Traffic Cones As Safety Devices In Road Traffic Grant 3,618,556 - Dittrich November 9, 1 | 1971-11-09 |
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