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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F01C
ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
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21/00
Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
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F01C21/10
Outer members for co-operation with rotary pistons; Casings
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