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Pressure drop alarm
US 2,417,940 A
Filed
: 10/28/1943
Issued
: 03/25/1947
Est. Priority Date
: 10/28/1943
Status: Expired due to Term
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Current Assignee
Stanley Lehman
Original Assignee
Stanley Lehman
Inventors
Lehman, Stanley
Application Number
US02/507,998
Time in Patent Office
1,244 Days
Field of Search
US Class Current
200/61.25
CPC Class Codes
B60C 23/0467
Electric contact means, e.g...
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