Patent classifications
E
FIXED CONSTRUCTIONS
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E04
BUILDING
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E04F
FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
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21/00
Implements for finishing work on buildings
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E04F21/24
of masses made in situ, e.g. smoothing tools
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E04F21/245
Rotary power trowels, i.e. helicopter trowels
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E04F21/248
used by an operator walking behind the trowel, i.e. walk-behind power trowels
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