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USPTO Patent Rankings Data through Dec 31, 2025
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L. Calvert Curlin — 2 Patents

OSOxytech Systems: 2 patents #2 of 14Top 15%
Painesville, OH: #118 of 292 inventorsTop 45%
Ohio: #30,551 of 73,341 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
L. Calvert Curlin has been granted 2 US patents while listed as an inventor at Oxytech Systems. The first was granted in 1989 and the most recent in August 1992. L. Calvert Curlin ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list L. Calvert Curlin in Painesville, OH, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5137612 Bonded busbar for diaphragm cell cathode Richard L. Romine, Robert B. Kubinski, James W. Pyle 1992-08-11
4834859 Diaphragm cell cathode assembly Richard L. Romine 1989-05-30