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Display devices with yttrium orthosilicate phosphors
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Patent number 4,894,583
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Issue date Jan 16, 1990
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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George W. Berkstresser
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Electron beam pumped laser
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Patent number 4,807,241
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Issue date Feb 21, 1989
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American Telephone and Telegraph Company AT&T Bell Laboratories
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George W. Berkstresser
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Pr:tb activated phosphor for use in CRTS
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Patent number 4,755,715
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Issue date Jul 5, 1988
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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George W. Berkstresser
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Electron beam pumped rod-like light emitters
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Patent number 4,695,762
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Issue date Sep 22, 1987
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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George W. Berkstresser
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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