| Patents for F02B 71 - Free-piston engines; Engines without rotary main shaft (1,404) | |
|---|---|
| 07/1976 | |
| 07/13/1976 | US3968732 Hydraulic power transmission system |
| 07/06/1976 | US3967714 Matrix printer having detachable elements |
| 03/1976 | |
| 03/02/1976 | US3941101 Impact action mechanism |
| 01/1976 | |
| 01/20/1976 | US3932989 Resonant gas-expansion engine with hydraulic energy conversion |