Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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F01B
MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
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2170/00
Steam engines, e.g. for locomotives or ships
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F01B2170/04
To-be-deleted with administrative transfer to parent group
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F01B2170/0405
To-be-deleted with administrative transfer to parent group
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