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Pole derrick
US 2,611,580 A
Filed
: 09/13/1949
Issued
: 09/23/1952
Est. Priority Date
: 09/13/1949
Status: Expired due to Term
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Current Assignee
Herman J. Troche
,
Howard Holan James
Original Assignee
Herman J. Troche
,
Howard Holan James
Inventors
Troche, Herman J.
,
HOWARD HOLAN JAMES
Application Number
US03/115,420
Time in Patent Office
1,106 Days
Field of Search
US Class Current
254/280
CPC Class Codes
B66C 23/36
mounted on road or rail veh...
B66C 2700/0357
Cranes on road or off-road ...
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