Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DH

David A. Helmstetter — 4 Patents

OLOlin: 4 patents #187 of 783Top 25%
Cleveland, TN: #51 of 243 inventorsTop 25%
Tennessee: #4,555 of 20,272 inventorsTop 25%
Overall (All Time): #1,298,149 of 4,157,543Top 35%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5116594 Salt handling apparatus for a hypochlorous acid reactor Garland E. Hilliard, James K. Melton 1992-05-26
4966764 Process for producing low aluminum membrane cell feedbrine Emily J. Reed 1990-10-30
4830837 Process for removing aluminum from concentrated alkali metal halide brines David D. Justice, Emily J. Reed, Tsujihiko Fukunaga 1989-05-16
4431495 Location of a structurally damaged membrane David L. Fair, Kenneth E. Woodard, Jr. 1984-02-14