DB

David M. Butler

FI Filmax: 1 patents #4 of 5Top 80%
Overall (All Time): #861,591 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8580098 Electrically enhanced cellulose filtration system Gerald L. Munson, Daniel P. McCormick 2013-11-12
8293091 Electrically enhanced cellulose filtration system Gerald L. Munson, Daniel P. McCormick 2012-10-23
7865526 Sheaf data model 2011-01-04
7409849 Oil filtration system for plural phase power equipment tanks Johnny James Clark 2008-08-12
6917943 Sheaf data model 2005-07-12
5167145 Measurement of blood coagulation time using infrared electromagnetic energy Harold B. Kirkpatrick, John H. Staehlin 1992-12-01