Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
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David A. Brookfield — 7 Patents

BLBrookfield Engineering Laboratories: 6 patents #1 of 8Top 15%
Sharon, MA: #178 of 848 inventorsTop 25%
Massachusetts: #17,885 of 88,656 inventorsTop 25%
Overall (All Time): #734,138 of 4,157,543Top 20%
7 Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
9243882 Low friction rheometer 2016-01-26
6539779 Support system with radially rigid wire suspension 2003-04-01
5535619 Pressurized viscometer 1996-07-16
5531102 Viscometer usable in situ in large reactor vessels Robert Bishop 1996-07-02
5503003 Portable viscometer 1996-04-02
5167143 Rheometer System 1992-12-01
4448061 Viscometer with a continuously variable electronic readout 1984-05-15