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Differential pressure sensing unit
US 2,751,530 A
Filed
: 01/04/1954
Issued
: 06/19/1956
Est. Priority Date
: 01/04/1954
Status: Expired due to Term
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Current Assignee
Robert W. Armstrong
Original Assignee
Robert W. Armstrong
Inventors
Armstrong, Robert W.
Application Number
US03/402,084
Time in Patent Office
897 Days
Field of Search
US Class Current
361/283.3
CPC Class Codes
G01L 13/025
using diaphragms
G01L 9/0072
using variations in capacit...
G05F 1/567
for temperature compensation
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