David Frederick Diefenderfer

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Manassas, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for preventing chip breakage during semiconduc...
- Patent number 6,171,873
- Issue date Jan 9, 2001
- International Business Machines Corporation
- Ronald Lee Mendelson
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method and apparatus for preventing chip breakage during semiconduc...
- Patent number 5,888,838
- Issue date Mar 30, 1999
- International Business Machines Corporation
- Ronald Lee Mendelson
- H01 - BASIC ELECTRIC ELEMENTS