Patent classifications
E
FIXED CONSTRUCTIONS
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E03
WATER SUPPLY; SEWERAGE
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E03F
SEWERS; CESSPOOLS
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E03F5/14
Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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E03F5/16
Devices for separating oil, water or grease from sewage in drains leading to the main sewer
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