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Aspirating apparatus
US 2,947,470 A
Filed
: 02/25/1957
Issued
: 08/02/1960
Est. Priority Date
: 03/02/1956
Status: Expired due to Term
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Current Assignee
Henning M. Ruben
,
Holger Hesse
Original Assignee
Henning M. Ruben
,
Holger Hesse
Inventors
Ruben, Henning M.
,
HOLGER HESSE
Application Number
US03/642,033
Time in Patent Office
1,254 Days
Field of Search
US Class Current
604/134
CPC Class Codes
A61M 1/71
Suction drainage systems co...
A61M 1/82
Membrane pumps, e.g. bulbs
A61M 2205/071
hand operated
F04B 45/02
having bellows
F04F 3/00
Pumps using negative pressu...
Y10T 137/85978
With pump
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