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Jan Gerkema
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Eindhoven, NL
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last 30 patents
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Patent Grant
X-ray tube comprising an anode disc rotatably journalled on a helic...
Patent number
4,644,577
Issue date
Feb 17, 1987
U.S. Philips Corporation
Jan Gerkema
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
X-ray tube comprising anode disc rotatably supported by bearing hav...
Patent number
4,641,332
Issue date
Feb 3, 1987
U.S. Philips Corporation
Jan Gerkema
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Metal-lubricated helical-groove bearing comprising an anti-wetting...
Patent number
4,614,445
Issue date
Sep 30, 1986
U.S. Philips Corporation
Jan Gerkema
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
X-Ray tube having a rotary anode
Patent number
4,562,587
Issue date
Dec 31, 1985
U.S. Philips Corporation
Jan Gerkema
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Device incorporating a bearing
Patent number
4,490,264
Issue date
Dec 25, 1984
U.S. Philips Corporation
Jan Gerkema
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Rotary anode X-ray tube
Patent number
4,357,555
Issue date
Nov 2, 1982
U.S. Philips Corporation
Jan Gerkema
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Thin-film magnetic head for reading and writing information
Patent number
4,300,177
Issue date
Nov 10, 1981
U.S. Philips Corporation
Gerrit J. Koel
G11 - INFORMATION STORAGE
Information
Patent Grant
Rotary-anode X-ray tube
Patent number
4,210,371
Issue date
Jul 1, 1980
U.S. Philips Corporation
Jan Gerkema
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Method of reinforcing a conductive base pattern by electroplating a...
Patent number
4,175,010
Issue date
Nov 20, 1979
U.S. Philips Corporation
Gerrit J. Koel
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Grant
Magnetic head using a magnetic field-sensitive element and method o...
Patent number
4,151,574
Issue date
Apr 24, 1979
U.S. Philips Corporation
Jan Gerkema
G11 - INFORMATION STORAGE
Information
Patent Grant
Thin-film magnetic head for reading and writing information
Patent number
4,150,408
Issue date
Apr 17, 1979
U.S. Philips Corporation
Gerrit J. Koel
G11 - INFORMATION STORAGE
Information
Patent Grant
Thin-film magnetic head for reading and writing information
Patent number
4,100,583
Issue date
Jul 11, 1978
U.S. Philips Corporation
Gerrit J. Koel
G11 - INFORMATION STORAGE
Information
Patent Grant
Thin film magnetic head with a gap formed between a loop shaped cor...
Patent number
4,085,430
Issue date
Apr 18, 1978
U.S. Philips Corporation
Jan T. Gerkema
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of manufacturing a device comprising a semiconductor body
Patent number
3,968,565
Issue date
Jul 13, 1976
U.S. Philips Corporation
Theodorus Cornelius Johannes Maria Bertens
G11 - INFORMATION STORAGE