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Grooved tubing for connection with sleeve type coupling
US 3,015,502 A
Filed
: 11/29/1957
Issued
: 01/02/1962
Est. Priority Date
: 11/29/1957
Status: Expired due to Term
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Current Assignee
Edward W. Piatek
,
Raymond B. Frost
Original Assignee
Edward W. Piatek
,
Raymond B. Frost
Inventors
Frost, Raymond B.
,
Piatek, Edward W.
Application Number
US03/699,866
Time in Patent Office
1,495 Days
Field of Search
US Class Current
285/112
CPC Class Codes
B21D 17/04
by rolling
F16L 17/04
with longitudinally split o...
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