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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DC

David C. Chambers — 7 Patents

3M: 7 patents #2,219 of 11,543Top 20%
Saint Paul, MN: #176 of 620 inventorsTop 30%
Minnesota: #10,472 of 52,454 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
David C. Chambers has been granted 7 US patents while listed as an inventor at 3M. The first was granted in 1989 and the most recent in January 2008. David C. Chambers ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list David C. Chambers in Saint Paul, MN, US.

Patents per Year

Patents granted per year, 1989 to 2008Bar chart with a peak of 2 patents in 2003.peak 21989: 1 patents19891999: 1 patents19992003: 2 patents20032004: 2 patents20042008: 1 patents2008

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7320341 Protective liner for slurry pipelines Marie-Claude M. Brandys, Kam C. Wu, David E. Livingstone, John T. Kilbourne 2008-01-22 $18,826,000
6834612 Method and apparatus for making particle-embedded webs Glen Connell, Ranjith Divigalpitiya, David E. Livingstone, Agatona D. Monteagudo, Susan C. Noe +1 more 2004-12-28 $50,362,000
6820382 Fire stop and its use Laurence M. Whitty 2004-11-23 $20,223,000
6569494 Method and apparatus for making particle-embedded webs Glen Connell, Ranjith Divigalpitiya, David E. Livingstone, Agatona D. Monteagudo, Susan C. Noe +1 more 2003-05-27 $17,300,000
6511701 Coatings and methods Ranjith Divigalpitiya, Gabriella Miholics 2003-01-28 $31,704,000
5895170 Flexible raised pavement marker, mounting device and method Robin G. Pitman 1999-04-20 $41,706,000
4881061 Article removal control system 1989-11-14 $8,913,000