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Vacuum cleaner
US 2,980,939 A
Filed
: 11/18/1957
Issued
: 04/25/1961
Est. Priority Date
: 11/18/1957
Status: Expired due to Term
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Petitions
17
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17 Citations
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Current Assignee
Charles H. Sparklin
,
Emery L. Hall
Original Assignee
Charles H. Sparklin
,
Emery L. Hall
Inventors
Sparklin, Charles H.
,
Hall, Emery L.
Application Number
US03/697,239
Time in Patent Office
1,254 Days
Field of Search
US Class Current
15/377
CPC Class Codes
A47L 9/0411
driven by electric motor
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