Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Robert J. Littrell — 4 Patents in 2021

VTVesper Technologies: 3 patents #1 of 5Top 20%
University of Michigan: 2 patents #27 of 470Top 6%
Belmont, MA: #17 of 237 inventorsTop 8%
Massachusetts: #867 of 14,123 inventorsTop 7%
Overall (2021): #41,454 of 548,734Top 8%
4 Patents 2021

Issued Patents 2021

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11099078 Acoustic sensor with temperature structure Yu Hui, Craig Core, Ronald Gagnon 2021-08-24
11088315 Piezoelectric MEMS microphone Karl Grosh 2021-08-10
10964880 Piezoelectric MEMS microphone Karl Grosh 2021-03-30
10917727 Transducer system with configurable acoustic overload point Ronald Gagnon 2021-02-09