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DE417099C Expired / Lapsed DE ⏱️ 0.0 years remaining

Thermocouple cathode tubes

Assignee: Individual
•
Filing: 1920-10-17
•
Granted: 1925-08-03
•
Expires: 1940-10-17
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Abstract

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Inventors

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Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-10-24 17:36
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/02; H01J2893/00; H01J2893/0001

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