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Surgical drain
US 3,020,913 A
Filed
: 07/15/1958
Issued
: 02/13/1962
Est. Priority Date
: 07/15/1958
Status: Expired due to Term
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Current Assignee
William T. Heyer
Original Assignee
William T. Heyer
Inventors
Heyer, William T.
Application Number
US03/748,652
Time in Patent Office
1,309 Days
Field of Search
US Class Current
604/9
CPC Class Codes
A61M 2025/0076
Unidirectional valves
A61M 25/00
Catheters; Hollow probes di...
A61M 25/0068
Static characteristics of t...
A61M 25/007
Side holes, e.g. their prof...
A61M 25/0108
using radio-opaque or ultra...
A61M 27/006
Cerebrospinal drainage; Acc...
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