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INFRARED LIQUID LEVEL INSPECTION SYSTEM FOR A CONTAINER WHICH MAY CONTAIN FOAM ABOVE THE LIQUID
US 3,454,759 A
Filed
: 04/22/1966
Issued
: 07/08/1969
Est. Priority Date
: 04/22/1966
Status: Expired due to Term
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Current Assignee
Fredrick L. Calhoun
Original Assignee
Fredrick L. Calhoun
Inventors
Calhoun, Fredrick L.
Application Number
US04/544,445
Time in Patent Office
1,173 Days
Field of Search
US Class Current
250/338.1
CPC Class Codes
G01F 23/2921
for discrete levels
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