Title:
Vacuum cleaning machine
United States Patent 2643732


Inventors:
Keen, Hermon C.
Application Number:
US24847951A
Publication Date:
06/30/1953
Filing Date:
09/27/1951
Assignee:
CONTINENTAL CAR NA VAR CORP
Primary Class:
Other Classes:
15/321, 55/303, 55/319, 55/379
International Classes:
A47L7/00
View Patent Images:
US Patent References:
2549181Cleaning apparatus1951-04-17
2538763Phenylaminopropandiols1951-01-23
2499876Cleaning apparatus1950-03-07
2339640Liquid carbonation1944-01-18
2327181Vacuum cleaner1943-08-17
2219567Vacuum cleaner1940-10-29