William D. Caldwell

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Bessemer, AL, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for preventing coronal discharge
- Patent number 6,455,782
- Issue date Sep 24, 2002
- Bethea Power Products
- Wei-Chung Lin
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for preventing coronal discharge
- Patent number 5,552,566
- Issue date Sep 3, 1996
- Reliable Bethea Power Products
- Wei-Chung Lin
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Auxiliary cable attachment
- Patent number 5,445,348
- Issue date Aug 29, 1995
- Reliable Bethea Power Products, Inc.
- William D. Caldwell
- E04 - BUILDING