John T. Campbell

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Midwest, WY, US

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Patents Grantslast 30 patents

Information Patent Grant
Vented and valved pouring spout
- Patent number 4,946,079
- Issue date Aug 7, 1990
- John T. Campbell
- B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
Information Patent Grant
Pickup bed cover
- Patent number 4,252,362
- Issue date Feb 24, 1981
- John T. Campbell
- B60 - VEHICLES IN GENERAL