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Pipeline ditch filling and pipe padding machine
US 2,857,691 A
Filed
: 02/13/1956
Issued
: 10/28/1958
Est. Priority Date
: 02/13/1956
Status: Expired due to Term
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Current Assignee
Michael Curran Donald
Original Assignee
Michael Curran Donald
Inventors
MICHAEL CURRAN DONALD
Application Number
US03/565,002
Time in Patent Office
988 Days
Field of Search
US Class Current
172/33
CPC Class Codes
E02F 3/248
Cleaning the wheels or empt...
E02F 5/226
with means for processing t...
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