Patent DE707257C successfully refreshed from Google Patents.
DE707257C
Expired / Lapsed
DE
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Electric seismograph for mining purposes or ground surveys
Assignee: FRIEDRICH TRAPPE DR
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Filing: 1936-06-27
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Granted: 1941-06-17
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Expires: 1956-06-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-09 00:13
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
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