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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E02F5/10
with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
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E02F5/104
for burying conduits or cables in trenches under water
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E02F5/105
self-propulsed units moving on the underwater bottom
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