Leonard T. M. Ebben

Follow

Person

Eindhoven, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Method of purifying quartz sand
- Patent number 4,804,422
- Issue date Feb 14, 1989
- U.S. Philips Corporation
- Emmanuel Papanikolau
- C03 - GLASS MINERAL OR SLAG WOOL