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Filter replacement mechanism for vacuum cleaners
US 2,621,756 A
Filed
: 01/03/1949
Issued
: 12/16/1952
Est. Priority Date
: 02/18/1948
Status: Expired due to Term
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Current Assignee
Edgar P. Senne
Original Assignee
Edgar P. Senne
Inventors
Senne, Edgar P.
Application Number
US03/068,953
Time in Patent Office
1,443 Days
Field of Search
US Class Current
55/356
CPC Class Codes
A47L 9/00
Details or accessories of s...
A47L 9/19
Means for monitoring filter...
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