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RETRACTABLE HOSE-TYPE VACUUM CLEANING SYSTEM AND METHOD
US 3,520,725 A
Filed
: 08/30/1967
Issued
: 07/14/1970
Est. Priority Date
: 08/19/1966
Status: Expired due to Term
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Current Assignee
Benjamin Electric Manufacturing Company
Original Assignee
James C. Hamrick
Inventors
Hamrick, James C.
Application Number
US04/664,432
Time in Patent Office
1,049 Days
Field of Search
US Class Current
134/21
CPC Class Codes
A47L 5/38
Built-in suction cleaner in...
F16L 3/01
for supporting or guiding t...
Y10S 138/08
Bent shaped retained
Y10S 55/08
Built-in vacuum cleaners
Y10T 137/6918
With hose storage or retrie...
Y10T 137/6943
Biased to retracted position
Y10T 137/698
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