Pressure-indicating device and alarm signal
United States Patent 1431914

Inventors:
Dashner, Emery J.
Flint, Charles H.
Publication Date:
10/10/1922
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Assignee:
Dashner, Emery J.
Flint, Charles H.
Primary Class:
123/196S
Other Classes:
340/451, 200/83R, 340/870.080, 246/121
International Classes:
G01L19/08; G01L23/08; G01L19/00; G01L23/00