Gerardus H. M. Siebers

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Roosendaal, NL

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Patents Grantslast 30 patents

Information Patent Grant
Low-pressure mercury vapour discharge lamp
- Patent number 4,727,283
- Issue date Feb 23, 1988
- U.S. Philips Corporation
- Johannes T. C. van Kemenade
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Gas-tight sintered translucent aluminum oxide and method
- Patent number 4,699,774
- Issue date Oct 13, 1987
- U.S. Philips Corporation
- Peter R. Prud'Homme Van Reine
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES