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| Patents for F01B 11 - Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type (808) |
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| 03/29/1977 | US4014249 Pneumatically actuated sanding tool | | 09/21/1976 | US3981280 Two-stroke combustion engines | | 08/17/1976 | US3974885 Pneumatic percussive power tool | | 08/10/1976 | US3973771 Illusion amusement device | | 07/06/1976 | US3967542 Hydraulic intensifier | | 06/08/1976 | US3961564 Fluid motor and combination bumper and sealing ring therefor | | 03/02/1976 | US3940937 Intensifier | | 02/10/1976 | US3937018 Power piston actuated displacer piston driving means for free-piston stirling cycle type engine |
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