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David C. Gertz
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Citrus Heights, CA, US
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last 30 patents
Information
Patent Grant
Highway crash cushion and components thereof
Patent number
5,868,521
Issue date
Feb 9, 1999
Energy Absorption Systems, Inc.
Michael H. Oberth
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Shear loading energy absorbing device
Patent number
5,403,113
Issue date
Apr 4, 1995
Energy Absorption Systems, Inc.
David C. Gertz
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Energy absorbing roadside crash barrier
Patent number
5,248,129
Issue date
Sep 28, 1993
Energy Absorption Systems, Inc.
David C. Gertz
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Vehicle impact attenuating device
Patent number
5,199,755
Issue date
Apr 6, 1993
Energy Absorption Systems, Inc.
David C. Gertz
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Vehicle crash barrier
Patent number
5,022,782
Issue date
Jun 11, 1991
Energy Absorption Systems, Inc.
David C. Gertz
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Energy absorbing pneumatic crash cushion
Patent number
4,674,911
Issue date
Jun 23, 1987
Energy Absorption Systems, Inc.
David C. Gertz
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Inlet turbine powered exhaust extractor for internal combustion eng...
Patent number
4,439,983
Issue date
Apr 3, 1984
David C. Gertz
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Shear action and compression energy absorber
Patent number
4,352,484
Issue date
Oct 5, 1982
Energy Absorption Systems, Inc.
David C. Gertz
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES