Patent classifications
E
FIXED CONSTRUCTIONS
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E01
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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E01C
CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
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E01C11/24
Methods or arrangements for preventing slipperiness or protecting against influences of the weather
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E01C11/26
Permanently installed heating or blowing devices; ; Mounting thereof
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E01C11/265
Embedded electrical heating elements; ; Mounting thereof
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