Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Brookfield, IL ranks #5,691 worldwide for total patents filed all time, with 449 patents from 128 inventors. Leading employers of inventors based in Brookfield, IL include Proxense, Sloan Valve, Pti Marketing Technologies. That works out to 23.1 patents per 1,000 residents, a common benchmark for comparing regional innovation intensity.

Showing 1–50 of 128 inventors

Rank Inventor Primary Company Patents
1 Fred S. Hirt Proxense 35
2 Richard A. Nortier Sloan Valve 27
3 Douglas Neal Cogan Pti Marketing Technologies 20
#4 Sonya S. Johnson Wm. Wrigley Jr. 18
#5 James E. Huebler Institute Of Gas Technology 16
#6 Paul Feuerstein Sram 15
#7 Mark D. Siegler The Chamberlain Group 13
#8 Richard A. Knight Gas Technology Institute 12
#8 John D. Sharp Millennium Pharmaceuticals 12
#10 John P. Duve Eaton 10
#11 Scott L. Falater Harris 9
#12 William Phuong Lam Peerless Industries 8
#12 Charles F. Davison Norwood Marking & Equipment Co. 8
#12 Michael F. Nickipuck 8
#15 Olga Zaborina University Of Illinois 7
#16 Mitchell J. Kowalczyk Uop 6
#16 Aldo Allori International Harvester 6
#16 Gary L. Dorst AT&T 6
#16 Rodney Wallace Union Carbide 6
#20 Eric Andrew Faurie Entigenlogic 5
#20 Isaac Suwa Traylor Electro-Motive Diesel 5
#20 Paul Vlasek AT&T 5
#20 Kent E. Wardle Terrapower 5
#20 Brett Fugate 5
#20 Horng-Yuan Wen American Air Liquide 5
#26 Ronald Christiaan Weber Ewac Holding B.V. 4
#26 Jill Barbara Laz The Procter & Gamble 4
#26 Charles K. Kubik Gte Automatic Electric Laboratories, Incorporated 4
#26 Ladislav Jurik 4
#26 Steven J. Krejcik Bowe Bell & Howell 4
#26 Christopher P. Turcotte Magnetrol International, Incorporated 4
#26 Juan Uribe Charles Industries 4
#33 Joseph T. Kozlowski Uop 3
#33 George J. Eisner 3
#33 Thomas G. Schoenberg Mcintyre Group 3
#33 Ezekial Johnson Crown Packaging Technology 3
#33 Vincent G. Mezera Uop 3
#33 Jose Aguilera Beeline Group 3
#33 Daniel Gleason Mattel 3
#33 Edward A. Lobbezoo Knape & Vogt Manufacturing 3
#33 Matthew Wilson Bally Gaming 3
#33 Yasin Guzeldereli Standard Car Truck 3
#33 Fred Jaklic Molex 3
#33 Cyril W. Frank Pathfinder Graphic Associates 3
#33 Joseph L. Mehaffey Akzo America 3
#33 James H. Larsen Dana Limited 3
#33 Stanley T. Walczak The Mills 3
#48 Robert O. Rada AT&T 2
#48 Thomas Matousek 2
#48 Peter Ziminski James Hardie Technology Limited 2

Part of Illinois