Method of making a ceramic body of densified tungsten carbide Grant US-7309373-B2 United States of America 18 Dec 2007
Method of making a ceramic body of densified tungsten carbide Grant US-6843824-B2 United States of America 18 Jan 2005
Ceramic cutting insert of polycrystalline tungsten carbide Grant US-6634837-B1 United States of America 21 Oct 2003
Densified micrograin refractory metal or solid solution solution (mixed metal) carbide… Grant US-5563107-A United States of America 08 Oct 1996