Patent DE609666C successfully refreshed from Google Patents.
DE609666C
Expired / Lapsed
DE
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Roller shutter that is opened by a spring on the winding drum and held in the closed position by a locking device
Assignee: ROLLADENWERK Gebr EFFERTZ G M
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Filing: —
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Granted: 1935-02-19
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Expires: 1952-02-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/56; E06B9/68; E06B9/76; E06B9/80; E06B9/82
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