Berlin
Germany
3
2009-12-24
Ulrich Weitz from Berlin, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
CORE FOR PROPPANT AND PROCESS FOR ITS PRODUCTION AND USE
#2 | 2007-07-26Core for proppant and process for its production
#3 | 2007-07-26Core for proppant and process for its production
4079820 ⎘