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Patents Grantslast 30 patents

Information Patent Grant
3915224
- Patent number 3,915,224
- Issue date Oct 28, 1975
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
3802497
- Patent number 3,802,497
- Issue date Apr 9, 1974
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
3690374
- Patent number 3,690,374
- Issue date Sep 12, 1972
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
3547188
- Patent number 3,547,188
- Issue date Dec 15, 1970
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
3231016
- Patent number 3,231,016
- Issue date Jan 25, 1966
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
3144080
- Patent number 3,144,080
- Issue date Aug 11, 1964
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
2819045
- Patent number 2,819,045
- Issue date Jan 7, 1958
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
1831971
- Patent number 1,831,971
- Issue date Nov 17, 1931
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
997872
- Patent number 997,872
- Issue date Jul 11, 1911
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
471869
- Patent number 471,869
- Issue date Mar 29, 1892
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
403123
- Patent number 403,123
- Issue date May 14, 1889
- F28 - HEAT EXCHANGE IN GENERAL