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Centrifugal fan
US 3,398,880 A
Filed
: 12/28/1966
Issued
: 08/27/1968
Est. Priority Date
: 12/31/1965
Status: Expired due to Term
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22
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22 Citations
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Current Assignee
Sven Wallin
Original Assignee
Sven Wallin
Inventors
SVEN WALLIN
Application Number
US04/605,249
Time in Patent Office
608 Days
Field of Search
US Class Current
415/119
CPC Class Codes
F04D 25/16
Combinations of two or more...
F04D 25/166
using fans
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