Helictronic Forschungs- und Entwicklungs- Gesellschaft fur
Patent Applications and Registrations
Patent applications and USPTO patent grants for Helictronic Forschungs- und Entwicklungs- Gesellschaft fur.The latest application filed is for "method for making silicon rods".
- Helictronic Forschungs- und Entwicklungs- Gesellschaft fur - Berghausen DE
- Helictronic Forschungs- und Entwicklungs- Gesellschaft fur - Burghausen DE
| Patent | Date |
|---|---|
| Semicontinuous process for the manufacture of pure silicon Grant 4,312,850 - Dietl , et al. January 26, 1 | 1982-01-26 |
| Method for making silicon rods Grant 4,312,700 - Helmreich , et al. January 26, 1 | 1982-01-26 |
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