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Filter obstruction signal arrangement for air conditioning apparatus
US 3,201,772 A
Filed
: 12/22/1961
Issued
: 08/17/1965
Est. Priority Date
: 12/22/1961
Status: Expired due to Term
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Current Assignee
William T. Ladusaw
Original Assignee
William T. Ladusaw
Inventors
Ladusaw, William T.
Application Number
US04/161,470
Time in Patent Office
1,334 Days
Field of Search
US Class Current
340/607
CPC Class Codes
B01D 46/10
Particle separators, e.g. d...
F24F 11/39
Monitoring filter performance
F24F 13/20
Casings or covers
F24F 8/10
by separation, e.g. by filt...
F24F 8/108
using dry filter elements
Y10S 116/42
Oil filter
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