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Frederik C. Gehring
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Eindhoven, NL
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Patents Grants
last 30 patents
Information
Patent Grant
Electron tube comprising a semiconductor cathode
Patent number
6,552,485
Issue date
Apr 22, 2003
Koninklijke Philips Electronics N.V.
Frederik C. Gehring
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Display device and cathode ray tube
Patent number
6,528,958
Issue date
Mar 4, 2003
Koninklijke Philips Electronics N.V.
Jozef Johannes Maria Hulshof
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of inspecting a substrate furnished with a phosphor layer
Patent number
6,333,500
Issue date
Dec 25, 2001
U.S. Philips Corporation
Frederik C. Gehring
G01 - MEASURING TESTING
Information
Patent Grant
Cathode ray tube with a getter coating in the vicinity of a semicon...
Patent number
6,262,527
Issue date
Jul 17, 2001
U.S. Philips Corporation
Tom Van Zutphen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electron tube with a cesium source
Patent number
6,236,154
Issue date
May 22, 2001
U.S. Philips Corporation
Ron Kroon
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor cathode and electron tube comprising a semiconductor...
Patent number
6,064,074
Issue date
May 16, 2000
U.S. Philips Corporation
Tom Van Zutphen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electron-optical device having separate elongate electron-emitting...
Patent number
5,864,201
Issue date
Jan 26, 1999
U.S. Philips Corporation
Frederik C. Gehring
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electron-optical device
Patent number
5,831,380
Issue date
Nov 3, 1998
U.S. Philips Corporation
Tom Van Zutphen
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
ELECTRON TUBE COMPRISING A SEMICONDUCTOR CATHODE
Publication number
20020079823
Publication date
Jun 27, 2002
FREDERIK C. GEHRING
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Display device and cathode ray tube
Publication number
20020060536
Publication date
May 23, 2002
KONINKLIJKE PHILIPS ELECTREONICS N.V.
Jozef Johanes Maria Hulshof
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
METHOD OF INSPECTIONG A SUBSTRATE FURNISHED WITH A PHOSPHOR LAYER
Publication number
20010045519
Publication date
Nov 29, 2001
FREDERIK C. GEHRING
G01 - MEASURING TESTING