Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RC

Richard E. Clack — 8 Patents

CLClack: 8 patents #3 of 13Top 25%
DeForest, WI: #13 of 90 inventorsTop 15%
Wisconsin: #6,100 of 40,088 inventorsTop 20%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
Richard E. Clack has been granted 8 US patents while listed as an inventor at Clack. The first was granted in 1980 and the most recent in April 2000. Richard E. Clack ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Richard E. Clack in DeForest, WI, US.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
6051144 Liquid filtration system and replaceable filter cartridge usable therewith Robert A. Clack, Melvin R. Hemp, W. Roger McPherson 2000-04-18
RE35252 Fluid flow control device for water treatment systems Robert A. Clack, Melvin R. Hemp 1996-05-28
5460719 Modular flat filter assembly and method of making same Robert A. Clack, Paul Michael Pedersen 1995-10-24
5320752 Water purification system employing modular flat filter assembly Robert A. Clack 1994-06-14
5128035 Fluid flow control device for water treatment systems Robert A. Clack, Melvin R. Hemp 1992-07-07
5002664 Fluid flow control device for R.O. filtration purification systems Robert A. Clack, Melvin R. Hemp 1991-03-26
D296460 Cartridge for filtration or absorption media 1988-06-28
4235340 Salt grid for a brine tank Jack E. Wies 1980-11-25