SITA Maschinenbau- und Forschungs GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5326238 Rotating piston machine having cam controlled alternating pistonsExpiredAug 05, 93Jul 05, 94[F01C]
5121606 Thermodynamic cyclic processExpiredDec 05, 90Jun 16, 92[F01K]
5121792 Countercurrent heat-exchangerExpiredJun 06, 90Jun 16, 92[F28F]
4938668 Rotating piston machineExpiredJan 10, 89Jul 03, 90[F04C]

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