Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Enfield, CT ranks #2,120 worldwide for total patents filed all time, with 1,500 patents from 286 inventors. Leading employers of inventors based in Enfield, CT include Hamilton Sundstrand, Cidra Corporate Services, Abb Schweiz Ag.

Showing 1–50 of 286 inventors

Rank Inventor Primary Company Patents
1 Donald E. Army Hamilton Sundstrand 127
2 Mark R. Fernald Cidra Corporate Services 92
3 Gregory F. Rossano Abb Schweiz Ag 42
#4 Roger R. Lesieur International Fuel Cells 39
#5 Matthew Allen Elive 37
#6 Gary L. Hess Hamilton Sundstrand 36
#7 Brian Feeney Spalding Sports Worldwide 34
#8 Joe Ott RTX (Raytheon) 33
#9 Ned E. Cipollini Utc Fuel Cells 32
#10 Simon M. Muska Smith & Wesson 27
#10 Paul H. Zajchowski RTX (Raytheon) 27
#10 David B. Anderson Eli Lilly 27
#13 Mortimer S. Thompson Tri-Tech Systems International 26
#14 Douglas A. Parsons Hamilton Sundstrand 21
#15 Richard Lucas Gilbarco 17
#16 Kevin Walsh Apple 16
#16 Bard C. Teigen Combustion Engineering 16
#18 Claude W. LeBlond Gerber Garment Technology 15
#19 Pankaj Kothari Yahoo Holdings 12
#19 Mark F. Bartholomew RTX (Raytheon) 12
#19 Matthew William Miller Hamilton Sundstrand 12
#22 Robert E. Lambert Corporate Media Partners 11
#22 Elaine Beatrice Mackenzie Eastman Chemical 11
#22 Robert Richard Zielonka Irwin Industrial Tool 11
#22 Carl R. Bozzuto Combustion Engineering 11
#22 Robert J. Duga 11
#27 Richard A. Lomenzo RTX (Raytheon) 10
#27 Paul John Gongola Cooper Technologies 10
#27 Frank DeLuca Unknown 10
#27 Paul D. Kuczma Abb Alstom Power 10
#27 Daniel J. Griffin Dresser-Rand 10
#27 Peter M. Ballard Hamilton Sundstrand 10
#33 Bruce W. Wilhelm GE 9
#33 Patrick M. Hart RTX (Raytheon) 9
#33 Luca Bertuccioli RTX (Raytheon) 9
#33 David F. Bruton Abb Vie 9
#33 Kurt M. Critz RTX (Raytheon) 9
#33 Alex Coffey Topgolf Callaway Brands 9
#33 Nicholas Charles Kraus Hubbell Incorporated 9
#40 Michael R. Swift Bell And Howell 8
#40 Brian K. Douglas American Saw & Mfg. 8
#40 Nathan F. Champion RTX (Raytheon) 8
#40 Michael J. Piteo R.E. Phelon Company 8
#40 Gregory R. Strich Combustion Engineering 8
#45 Andrew J. Ranz Dresser-Rand 7
#45 Paul E. Hamel Hamilton Sundstrand 7
#45 William A. Gelinas Loctite 7
#45 Kenneth P. Hansen RTX (Raytheon) 7
#45 Poinon Z. Sanogo Black & Decker 7
#45 Donald Pierce Hartford Fire Insurance 7

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