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| Patents for F04B 25 - Multi-stage pumps specially adapted for elastic fluids (1,208) |
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| 09/05/1978 | US4111609 Multistage gas compressor | | 08/08/1978 | US4105374 Integrated multi-unit refrigeration motor-compressor assembly | | 07/25/1978 | US4102608 Reciprocatory piston and cylinder machines | | 06/27/1978 | US4097202 Auxiliary compressor assembly | | 06/08/1976 | US3961868 Air compressor | | 05/25/1976 | US3958841 Non-friction pressure seal | | 05/18/1976 | US3956895 Heat engine | | 04/13/1976 | US3949554 Heat engine |
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