JD

John R. Dunkle

HA Hach: 2 patents #59 of 214Top 30%
Overall (All Time): #2,284,952 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5397452 Reference electrode Michael D. Buck, Steven R. Zelenak, Gary W. Johnson, James D. McWilliams 1995-03-14
5393402 Electrode with crystal membrane Nelson E. Dervaes 1995-02-28