Patent DE768148C successfully refreshed from Google Patents.
DE768148C
Expired / Lapsed
DE
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Process for the production of a pipe with a polygonal constant or narrowing internal cross-section
Assignee: GUSTAV APPEL MASCHINENFABRIK
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Filing: 1941-12-28
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Granted: 1958-07-03
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Expires: 1961-12-28
Abstract
No abstract record available.
Inventors
- 👤 Franz Dipl-Ing Grill
- 👤 Bruno Dipl-Ing Kralowetz
- 👤 Otto Selle
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 02:57
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/152; B21C37/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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