DS

David L. Stephens

UN Unimin: 1 patents #16 of 32Top 50%
Overall (All Time): #2,172,771 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7104403 Static two stage air classifier Gerald G. Verret, Richard Lalancette 2006-09-12
5454376 Breathing monitor articles of wearing apparel 1995-10-03