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USPTO Patent Rankings Data through Dec 31, 2025
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Denis E. Duppong — 3 Patents

FMFmc: 3 patents #430 of 1,735Top 25%
Cedar Rapids, IA: #479 of 1,358 inventorsTop 40%
Iowa: #4,706 of 15,303 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Denis E. Duppong has been granted 3 US patents while listed as an inventor at Fmc. The first was granted in 1987 and the most recent in January 1989. Denis E. Duppong ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Denis E. Duppong in Cedar Rapids, IA, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4796029 Turn tilt table James R. Dvorsky, David M. Mick, Richard L. Brandt, Leland M. Rieck 1989-01-03 $7,935,000
4736633 Multipurpose lifting and pulling vehicle Richard L. Brandt, David M. Mick, Leland M. Rieck 1988-04-12 $7,463,000
4649375 Apparatus for detecting power lines Bernard L. McGrew, Ramsay P. Decker 1987-03-10 $9,825,000