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USPTO Patent Rankings Data through Dec 31, 2025
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James E. Stolhand — 4 Patents

COConoco: 4 patents #81 of 638Top 15%
Ponca City, OK: #111 of 444 inventorsTop 25%
Oklahoma: #2,661 of 12,736 inventorsTop 25%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
James E. Stolhand has been granted 4 US patents while listed as an inventor at Conoco. The first was granted in 1984 and the most recent in February 1990. James E. Stolhand ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list James E. Stolhand in Ponca City, OK, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4900445 Low pressure hydrocyclone separator David A. Flanigan, Elwyn Shimoda 1990-02-13
4844817 Low pressure hydrocyclone separator David A. Flanigan, Elwyn Shimoda 1989-07-04
4527626 Process and apparatus for removing dissolved oxygen Lisa A. Cantu, Marvin E. Yost, Robert L. Coffee 1985-07-09
4444260 Oil solvation process for the treatment of oil contaminated sand Phil A. Boyd 1984-04-24