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Vacuum cleaning apparatus
US 2,171,248 A
Filed
: 01/20/1936
Issued
: 08/29/1939
Est. Priority Date
: 02/21/1935
Status: Expired due to Term
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117
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Current Assignee
Berkel Wilhelmus Adrianus Van
Original Assignee
Berkel Wilhelmus Adrianus Van
Inventors
BERKEL WILHELMUS ADRIANUS VAN
Application Number
US02/059,931
Time in Patent Office
1,317 Days
Field of Search
US Class Current
55/392
CPC Class Codes
A47L 9/1608
Cyclonic chamber constructions
A47L 9/1633
Concentric cyclones
A47L 9/1666
with filtering means
A47L 9/1675
movable, revolving or rotary
A47L 9/1683
Dust collecting chambers; D...
A47L 9/20
Means for cleaning filters
B04C 5/081
Shapes or dimensions
B04C 5/103
Bodies or members, e.g. bul...
B04C 5/14
Construction of the underfl...
Y10S 55/03
Vacuum cleaner
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