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USPTO Patent Rankings Data through Dec 31, 2025
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Robert E. Dempski — 4 Patents

Merck: 4 patents #2,516 of 9,382Top 30%
Dresher, PA: #40 of 120 inventorsTop 35%
Pennsylvania: #19,360 of 74,527 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Robert E. Dempski has been granted 4 US patents while listed as an inventor at Merck. The first was granted in 1983 and the most recent in January 1991. Robert E. Dempski ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Robert E. Dempski in Dresher, PA, US.

Patents per Year

Patents granted per year, 1983 to 1991Bar chart with a peak of 1 patents in 1983.peak 11983: 1 patents19831989: 1 patents19891990: 1 patents19901991: 1 patents1991

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4983400 Controlled release combination of carbidopa/levodopa Edward C. Scholtz, Donald W. Nibbelink, Scott Reines 1991-01-08 $30,554,000
4900755 Controlled release combination of carbidopa/levodopa Edward C. Scholtz, Donald W. Nibbelink, Scott Reines 1990-02-13 $52,070,000
4832957 Controlled release combination of carbidopa/levodopa Edward C. Scholtz, Donald W. Nibbelink, Scott Reines 1989-05-23 $11,519,000
4404193 Methyldopa composition Joseph L. O'Neill 1983-09-13 $15,801,000