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

Warren Ma — 3 Patents

NONoxso: 3 patents #3 of 13Top 25%
Pittsburgh, PA: #2,519 of 7,570 inventorsTop 35%
Pennsylvania: #23,787 of 74,527 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Warren Ma has been granted 3 US patents while listed as an inventor at Noxso. The first was granted in 1994 and the most recent in September 2000. Warren Ma ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Warren Ma in Pittsburgh, PA, US.

Patents per Year

Patents granted per year, 1994 to 2000Bar chart with a peak of 1 patents in 1994.peak 11994: 1 patents19941995: 1 patents19952000: 1 patents2000

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6113870 Closed loop no.sub.x reduction John L. Haslbeck, James B. Black 2000-09-05
5383955 Nitrogen oxides and sulfur oxides removal utilizing transport line adsorber Lewis G. Neal, Min-Yan Chang, Qian Zhou, Carmo J. Pereira, Karl W. Plumlee +1 more 1995-01-24 $715,000
5302188 Nitrogen oxides and sulfur oxides removal utilizing transport line adsorber Lewis G. Neal 1994-04-12 $833,000