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

Robert A. Clack — 20 Patents

CLClack: 18 patents #1 of 13Top 8%
Monona, WI: #8 of 91 inventorsTop 9%
Wisconsin: #1,951 of 40,088 inventorsTop 5%
Overall (All Time): #214,803 of 4,157,543Top 6%
20 Patents All Time
Robert A. Clack has been granted 20 US patents while listed as an inventor at Clack. The first was granted in 1985 and the most recent in April 2010. Robert A. Clack ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Robert A. Clack in Monona, WI, US.

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #TitleCo-InventorsDate
7690914 Apparatus for making a blow molded article with integral insert 2010-04-06
7476354 Method and apparatus for making a blow molded article with integral insert 2009-01-13
6444127 Water conditioning unit control valve Don Vaughan, Richard W. Wilder 2002-09-03
6051144 Liquid filtration system and replaceable filter cartridge usable therewith Melvin R. Hemp, Richard E. Clack, W. Roger McPherson 2000-04-18
5876610 Method and apparatus for monitoring liquid flow through an enclosed stream Melvin R. Hemp, W. Roger McPherson 1999-03-02
D386242 Countertop filter Daniel A. Klein, Leigh A. Fieldstad, Mark Gilbertson 1997-11-11
5672232 Apparatus for producing tubular products from nonwoven fibers 1997-09-30
5560393 Self-contained, purified drinking water refrigerator storage apparatus 1996-10-01
RE35252 Fluid flow control device for water treatment systems Richard E. Clack, Melvin R. Hemp 1996-05-28
5460719 Modular flat filter assembly and method of making same Richard E. Clack, Paul Michael Pedersen 1995-10-24
5454944 Self-contained, purified drinking water refrigerator storage apparatus 1995-10-03
D355241 Water filter Russell Zylstra, John T. Dailey, Peter Chermak, Dan Klein, Melvin R. Hemp +2 more 1995-02-07
5366576 Method for producing tubular products from nonwoven fibers 1994-11-22
5320752 Water purification system employing modular flat filter assembly Richard E. Clack 1994-06-14
5290442 Self-contained, purified drinking water refrigerator storage apparatus 1994-03-01
5128035 Fluid flow control device for water treatment systems Richard E. Clack, Melvin R. Hemp 1992-07-07
5002664 Fluid flow control device for R.O. filtration purification systems Richard E. Clack, Melvin R. Hemp 1991-03-26
4997553 Storage and dispensing apparatus for reverse osmosis filtration purification system 1991-03-05
4806912 Monitoring system for a liquid purification system 1989-02-21
4496906 Liquid conductivity monitor 1985-01-29