Patent FR49349E successfully refreshed from Google Patents.
FR49349E
Expired / Lapsed
FR
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Device for determining the permeability of soils
Assignee: Louis Georges Edouard Lefranc
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Filing: 1938-04-05
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Granted: 1939-02-17
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Expires: 1958-04-05
Abstract
No abstract record available.
Inventors
- 👤 Louis Georges Edouard Lefranc
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 09:25
CPC Classifications
E; E21; E21B; E21B49/00; E02; E02D; E02D1/00; E02D1/02; E02D1/027; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243
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References Cited (Backward Citations)
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