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Spiral blower wheel
US 2,980,990 A
Filed
: 01/22/1957
Issued
: 04/25/1961
Est. Priority Date
: 01/22/1957
Status: Expired due to Term
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0
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15
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1
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Current Assignee
Vernco Corporation
Original Assignee
Lowell E. Sprouse
Inventors
Sprouse, Lowell E.
Application Number
US03/635,388
Time in Patent Office
1,554 Days
Field of Search
US Class Current
29/889.4
CPC Class Codes
F04D 29/283
rotors of the squirrel-cage...
Y10S 416/03
Sheet metal
Y10T 29/49329
Centrifugal blower or fan
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