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Helictronic Forschungs- Und Entwicklungs- Gesellschaft Fur

USPTO Granted Patents = 2

Forward Citations = 74

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5 inventors (with patents filed for the assignee):

Erhard Sirtl (2 out of 10 patents)

Dieter Helmreich (1 out of 5 patents)

Josef Dietl (1 out of 17 patents)

4. Claus Holm (1 out of 5 patents)

5. Theo Zollner (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4312850 - Semicontinuous process for the manufacture of pure silicon (1982-01-26),

2. 4312700 - Method for making silicon rods (1982-01-26),

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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#434 in undefined, undefined

#536 in

#92,630 in US

Helictronic Forschungs- Und Entwicklungs- Gesellschaft Fur

Forward Citations = 74

5 inventors:

Erhard Sirtl (2 out of 10 patents)

Dieter Helmreich (1 out of 5 patents)

Josef Dietl (1 out of 17 patents)

4. Claus Holm (1 out of 5 patents)

5. Theo Zollner (1 out of 1 patent)

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