Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Danbury, CT ranks #1,039 worldwide for total patents filed in 2021, with 140 patents from 88 inventors. Leading employers of inventors based in Danbury, CT include IBM, Entegris, Hologic. That works out to 1.6 patents per 1,000 residents, a common benchmark for comparing regional innovation intensity.

Showing 1–50 of 88 inventors

Rank Inventor Primary Company Patents
1 Hanhee Paik IBM 7
2 Michael D. Essenmacher IBM 6
3 Jason Boada IBM 4
3 Sharad N. Yedave Entegris 4
3 Chek Keong Tan IBM 4
3 Atanu K. Das Entegris 4
3 Elizabeth THOMAS Entegris 4
#8 Teryl Paul Taylor IBM 3
#8 Nikolaos Gkanatsios Hologic 3
#8 Kevin Sniffin Covidien Lp 3
#8 Bryan C. Hendrix Advanced Technology & Materials Co. 3
#8 Paula Margaret Ralston Eskra Technical Products 3
#8 Serge Bernard Mastercard 3
#8 Manjari Roy IBM 3
#15 Jianwen Han Macdermid Enthone 2
#15 Arun Surendranath Fuelcell Energy 2
#15 Alexander K. Raub Stc.Unm 2
#15 Eric Brian Catey Asml Holding N.V. 2
#15 Philip G. Emma IBM 2
#15 Joshua Kessler Mastercard 2
#15 Jacob Fahsbender Energizer Auto 2
#15 David M. Peck Hubbell Incorporated 2
#15 Vinay Kumar Reddy Kasireddy IBM 2
#15 Deborah A. Neumayer IBM 2
#15 Peter Zimmer IBM 2
#15 Radu Florian IBM 2
#27 Oleg Bly Entegris 1
#27 Jim Chen Priceline.Com 1
#27 An Sheng Huang Hewlett Packard Enterprise 1
#27 Douglas A. Cywar IBM 1
#27 Umesh Kumar Balaraj Balegar IBM 1
#27 Syed Umar Hassan Rizvi Asml Netherlands B.V. 1
#27 Dikran S. Meliksetian IBM 1
#27 Robert Papp Trafimet Group S.P.A. 1
#27 Laura A. Dellevigne PepsiCo 1
#27 Olga Vladimirovna Zatolochnaya Scripps Research 1
#27 Rocío K. PÉREZ BOE 1
#27 Peter M. Woyciesjes Prestone Products 1
#27 Taylor Cipully 1
#27 Hidenobu Hara Rock-Tenn Shared Services 1
#27 Avinash Dalmia Perkinelmer Las 1
#27 Anthony DeRubeis Witten Technologies 1
#27 Hossein Razavi BOE 1
#27 Wally Karrat IBM 1
#27 Richard Rozbicki Mastercard 1
#27 Tushar Vispute University Of Massachusetts 1
#27 Ming-Shih Hwang Case Western Reserve University 1
#27 Niravkumar Pandya Mastercard 1
#27 Tiara Elizabeth O'Neal Nouryon Chemicals International B.V. 1
#27 Jonathan MALWITZ Fuelcell Energy 1

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