George L. Duggan

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Manchester, NH, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure arc discharge lamp having barium hafnate impregnated...
- Patent number 5,550,431
- Issue date Aug 27, 1996
- Osram Sylvania Inc.
- George L. Duggan
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Mercury vapor discharge device
- Patent number 5,258,687
- Issue date Nov 2, 1993
- GTE Products Corporation
- George L. Duggan
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Tungsten-halogen lamp with preferential tungsten deposition site
- Patent number 4,450,381
- Issue date May 22, 1984
- GTE Products Corporation
- George B. Kendrick
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Incandescent lamp getter
- Patent number 4,233,536
- Issue date Nov 11, 1980
- GTE Products Corporation
- John F. Waymouth
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gettered incandescent lamp and method of making same
- Patent number 4,021,694
- Issue date May 3, 1977
- GTE Sylvania Incorporated
- George L. Duggan
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of flashing tungsten filament
- Patent number 4,012,659
- Issue date Mar 15, 1977
- GTE Sylvania Incorporated
- Edmund M. Passmore
- H01 - BASIC ELECTRIC ELEMENTS