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TWO WAVELENGTH INFRARED ANALYZER HAVING A PAIR OF VARIABLE INTERFERENCE FILTERS FOR DETERMINING THE RESPECTIVE WAVELENGTHS
US 3,435,209 A
Filed
: 03/10/1966
Issued
: 03/25/1969
Est. Priority Date
: 03/10/1966
Status: Expired due to Term
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Current Assignee
Keahl Gerald Thomas
Original Assignee
Keahl Gerald Thomas
Inventors
KEAHL GERALD THOMAS
Application Number
US04/533,213
Time in Patent Office
1,111 Days
Field of Search
US Class Current
250/339.06
CPC Class Codes
G01N 21/314
with comparison of measurem...
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