DR

David L. Roberts

Shell Oil Compny: 3 patents #1,070 of 4,423Top 25%
PU Philip Morris Usa: 2 patents #212 of 607Top 35%
DC Donaldson Company: 1 patents #454 of 695Top 70%
MU Michigan State University: 1 patents #51 of 212Top 25%
SB Shell Internationale Research Maatschappij B.V.: 1 patents #62 of 211Top 30%
Overall (All Time): #298,400 of 4,157,543Top 8%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
9433202 Insect trap 2016-09-06
D520594 Tail wagging fishing lure 2006-05-09
D495024 Popping fishing lure 2004-08-24
D443388 Front opening cigarette box Donald H. Evers 2001-06-05
6193060 Front opening cigarette box Donald H. Evers 2001-02-27
5759343 Taping gun mud pump apparatus 1998-06-02
D326917 Retaining strap for pacifier Clyde Hillier 1992-06-09
5077045 Method for suppressing weed grasses using xanthomonas campestris 1991-12-31
4990157 Soother retainer Clyde Hillier 1991-02-05
4834583 Method for installing a hollow pipe Ronald A. Lieffering 1989-05-30
4808038 Method for installing a hollow closed bottom pile Robert B. Stewart, Peter K. Currie 1989-02-28
4708177 Fume extractor device 1987-11-24
4643257 Method of recovering hydrocarbons from an underground formation Johan F. G. van Velzen 1987-02-17
4618200 Electrical plug restraint system Clyde Hillier 1986-10-21
4580657 Integral fluted tube for sound suppression and exhaust ejection Steven D. Schmeichel, Wayne M. Wagner, John S. Wiese, Bruce Hoppenstedt, Joanne E. Kleinhenz 1986-04-08
4402674 Air aspiration prevention pan 1983-09-06