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

John E. Ziegenfuss — 2 Patents

ESEcowater Systems: 2 patents #20 of 63Top 35%
Minneapolis, MN: #2,566 of 6,114 inventorsTop 45%
Minnesota: #23,881 of 52,454 inventorsTop 50%
Overall (All Time): #2,187,892 of 4,157,543Top 55%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6696963 Method and system for anticipating salt depletion Jeffrey Zimmerman, Gregory Kennedy, Jose Castro, Wesley F. Chapman 2004-02-24
D465546 Water softener having a contoured and sloping lid David T. Bardwell, Jeffrey Popowski 2002-11-12