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Andreas Drost
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Karlsruhe, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Ground covering elements of artificial stone material
Patent number
7,220,078
Issue date
May 22, 2007
F.von Langsdorff Licensing Limited
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Ground covering elements of artificial stone material
Patent number
6,942,420
Issue date
Sep 13, 2005
F. Von Langsdorff Licensing Limited
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Floor covering element consisting of artificial stone material and...
Patent number
6,898,906
Issue date
May 31, 2005
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Paving element
Patent number
D498543
Issue date
Nov 16, 2004
F. Von Langsdorff Licensing Limited
Michael Schmitz
D25 - Building units and construction elements
Information
Patent Grant
Paving element
Patent number
D485370
Issue date
Jan 13, 2004
F. Von Langsdorff Licensing Limited
Michael Schmitz
D25 - Building units and construction elements
Patents Applications
last 30 patents
Information
Patent Application
Ground covering elements of artificial stone material
Publication number
20050254894
Publication date
Nov 17, 2005
F. von Langsdorff Licensing Limited
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Application
Step stone for a stairway and a stairway assembled therefrom
Publication number
20040074167
Publication date
Apr 22, 2004
Andreas Drost
E04 - BUILDING
Information
Patent Application
Floor covering element consisting of artificial stone material and...
Publication number
20040045248
Publication date
Mar 11, 2004
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Application
Ground covering element for making a groove
Publication number
20030070384
Publication date
Apr 17, 2003
Andreas Drost
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES