Gordon T. Drygalski

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Chicago, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Reverse lip positive venting seal
- Patent number 4,616,836
- Issue date Oct 14, 1986
- Chicago Rawhide Mfg. Co.
- Gordon T. Drygalski
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Reverse lip positive venting seal
- Patent number 4,556,225
- Issue date Dec 3, 1985
- Chicago Rawhide Mfg. Co.
- Gordon T. Drygalski
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Oil seals with mounting surface vent mechanisms
- Patent number 4,421,326
- Issue date Dec 20, 1983
- Gordon T. Drygalski
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...