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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3/00
Dredgers; Soil-shifting machines
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E02F3/28
with digging tools mounted on a dipper- or bucket-arm; , i.e. there is either one arm or a pair of arms; , e.g. dippers, buckets
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E02F3/30
with a dipper-arm pivoted on a cantilever beam; , i.e. boom
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E02F3/308
working outwardly
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