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Wall cleaning device
US 2,857,606 A
Filed
: 07/13/1956
Issued
: 10/28/1958
Est. Priority Date
: 07/13/1956
Status: Expired due to Term
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Current Assignee
Charles Sperka
Original Assignee
Charles Sperka
Inventors
Sperka, Charles
Application Number
US03/597,619
Time in Patent Office
837 Days
Field of Search
US Class Current
15/98
CPC Class Codes
A47L 11/38
Machines, specially adapted...
A47L 11/4022
with means for recycling th...
A47L 11/4041
Roll shaped surface treatin...
A47L 11/4058
for adjusting the height of...
A47L 11/4069
Driving or transmission mea...
A47L 11/408
Means for supplying cleanin...
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