Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Marlborough, CT ranks #3,216 worldwide for total patents filed all time, with 938 patents from 114 inventors. Leading employers of inventors based in Marlborough, CT include RTX (Raytheon), Otis Elevator, Hamilton Sundstrand.

Showing 1–50 of 114 inventors

Rank Inventor Primary Company Patents
1 Michael J. Maloney RTX (Raytheon) 121
2 Marc J. Muldoon RTX (Raytheon) 88
3 John Joseph Marcin RTX (Raytheon) 77
#4 David Ulrich Furrer RTX (Raytheon) 50
#5 Boris Karpman RTX (Raytheon) 43
#6 Walter Thomas Schmidt Otis Elevator 33
#6 Kathryn S. Read RTX (Raytheon) 33
#8 David W. Morganson Hamilton Sundstrand 31
#9 Ronald R. Vitarelli Advanced Drainage Systems 29
#10 Steven B. Johnson RTX (Raytheon) 26
#11 James M. Koonankeil RTX (Raytheon) 23
#11 Justin R. Hawkes RTX (Raytheon) 23
#13 Dustin W. Davis RTX (Raytheon) 22
#14 William Proscia RTX (Raytheon) 18
#15 Leonard J. Bonville International Fuel Cells 17
#16 Nicholas E. Ulion RTX (Raytheon) 16
#17 Andrew S. Miller RTX (Raytheon) 12
#17 Scott C. Billings RTX (Raytheon) 12
#17 Stephen D. Murray RTX (Raytheon) 12
#20 Stephen A. Morford RTX (Raytheon) 11
#20 William A. Daniels RTX (Raytheon) 11
#22 Nicholas Waters Oren RTX (Raytheon) 10
#22 Walter A. Ledwith, Jr. RTX (Raytheon) 10
#24 Donald J. Hautman RTX (Raytheon) 7
#25 Erin Renee Hatzikostas Aetna 6
#25 Andrew P. Boursy RTX (Raytheon) 6
#25 Serge L. Shishkin RTX (Raytheon) 6
#25 Brian M. Fentress RTX (Raytheon) 6
#25 David M. Nissley RTX (Raytheon) 6
#25 Hala Mostafa RTX (Raytheon) 6
#25 Edward F. Migliaro, Jr. RTX (Raytheon) 6
#32 Timothy Braun Welch Allyn 5
#32 Alfred Russell Smiley Sikorsky Aircraft 5
#32 Kathleen L. Daudish Rheem Manufacturing 5
#32 Steve Wampold Unknown 5
#36 Jeffrey A. Deskus Bristol-Myers Squibb 4
#36 Russell A. Schwarzmann RTX (Raytheon) 4
#36 Michael J. Rajpolt International Fuel Cells 4
#36 Samuel R. Talbot Otis Elevator 4
#36 Benjamin Abraham Hamilton Sundstrand 4
#36 Douglas C. Mathews RTX (Raytheon) 4
#36 Kevin M. Eveker RTX (Raytheon) 4
#36 Jay Fletcher Hamilton Sundstrand 4
#36 Richard H. Barkalow RTX (Raytheon) 4
#45 Charles E. Trippel Fuel Tech 3
#45 Jeremy Kostick Henkel Limited 3
#45 Melvin H. Zeisser RTX (Raytheon) 3
#45 Kurt E. Oughstun RTX (Raytheon) 3
#45 Adam J. Diener RTX (Raytheon) 3
#45 Arthur D. Strauss 3

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