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Air filter control unit
US 3,020,976 A
Filed
: 12/31/1957
Issued
: 02/13/1962
Est. Priority Date
: 12/31/1957
Status: Expired due to Term
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3
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3 Citations
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Current Assignee
Philip L. Hyatt
Original Assignee
Philip L. Hyatt
Inventors
Hyatt, Philip L.
Application Number
US03/706,490
Time in Patent Office
1,505 Days
Field of Search
US Class Current
96/429
CPC Class Codes
B01D 46/46
automatic
F24F 13/28
Arrangement or mounting of ...
Y10S 55/34
Indicator and controllers
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