Patent classifications
E
FIXED CONSTRUCTIONS
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E02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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E02F
DREDGING; SOIL-SHIFTING
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5/00
Dredgers or soil-shifting machines for special purposes
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E02F5/02
for digging trenches or ditches
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E02F5/14
Component parts for trench excavators, e.g. indicating devices; travelling gear chassis, supports, skids
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E02F5/145
control and indicating devices
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