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AT139271B
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Biological sewage self-cleaning system.
Assignee: Max Ing Friedersdorff
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Filing: 1933-08-21
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Granted: 1934-11-10
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Expires: 1953-08-21
Abstract
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Inventors
- 👤 Max Ing Friedersdorff
Bibliographic Details
Application Number
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AT
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2026-11-07 16:20
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