FR540783A
Expired / Lapsed
FR
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Improvements to humidity indicators
Assignee: Compagnie Francaise Thomson Houston SA
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Filing: 1921-03-19
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Granted: 1922-07-18
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Expires: 1941-03-19
Abstract
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
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