Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Ontario, CA ranks #2,190 worldwide for total patents filed all time, with 1,451 patents from 347 inventors. Leading employers of inventors based in Ontario, CA include Mag Instrument, Cisco, NVIDIA. That works out to 8.3 patents per 1,000 residents, a common benchmark for comparing regional innovation intensity.

Showing 1–50 of 347 inventors

Rank Inventor Primary Company Patents
1 Anthony Maglica Mag Instrument 155
2 Yuan Xu Cisco 71
3 Jack E. Christensen NVIDIA 55
3 Pablo J. Ertze Landmark Enterprise 55
#5 Wei-Chieh Huang TSMC 54
#6 Robert L. Johnson Allen-Pal 53
#7 Yong Sun Catry International Group 37
#7 O. L. Weeks Cp Delaware 37
#9 Robert J. Blainey IBM 34
#10 Jose Jimenez Biosense Webster (Israel) 28
#11 Joseph F. Podlovits Wheel Group Holdings 23
#12 Michael Lee Simpson Oak Ridge Associated Universities 17
#12 Christopher Adkison Acorn Engineering 17
#14 Kevin-Dirk Pesirla Closas Direct Pack 16
#15 Uwe Harneit Electrolux Home Products 14
#15 Bradly Anderson Rsi Home Products Management 14
#17 Sayandro Versteylen Paper-Pak Industries 12
#17 Kunal Shoor Good Tree International 12
#17 Herbert C. Swim NVIDIA 12
#17 Brandon Puett Good Tree International 12
#21 Horst Bernhart Lightolier Division Of The Genlyte Group 11
#21 Brian T. Seymour Takata 11
#23 Ian P. A. Scali Sundance Spas 10
#23 Bohan Zhang Tencent 10
#23 Anthony Carmen Gallo Open Text 10
#23 Lee-Lung Yang Hong Kong Applied Science And Technology Research Institute Company Limited 10
#23 Yongming Sui Field Sport 10
#23 Patrick P. Treadway Fleetwood Enterprises 10
#29 Wayne Russell Power Probe Group 9
#30 Loran H. Bruso Warner-Lambert Company 8
#30 Matthew Paul Fried Carefusion 303 8
#30 Reid F. Lowell RTX (Raytheon) 8
#30 Sudheer Bandla Niagara Bottling 8
#30 Spencer J. Speer General Dynamics Corp., Pomona Division 8
#35 Steven P. Davies Hughes Aircraft 7
#35 Jeff R. Cunius Troy-Csl Lighting 7
#35 Robert A. Zarate Pacific Consolidated Industries 7
#35 Joey Tran New World Medical 7
#35 WenYi Hsu 7
#40 Michael J. Maciocia General Dynamics Corp., Pomona Division 6
#40 Mark Bartholomew 6
#40 Ronald P. Hardman 6
#40 Zhi Qiang Lu Easyhome Organization Manufacturing 6
#40 Donald P. Lorento Sms Concast Ag 6
#40 Donald G. Jones John Deere 6
#40 John Larry Kent The Toro 6
#40 Michael Ung Optopower Co. 6
#48 Issac P. Sargunam Maytag 5
#48 Gary L. Hethcoat 5
#48 Spiros Dimitratos Inscent 5

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