Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Frank E. Klein — 2 Patents

BOBOE: 2 patents #5,948 of 12,373Top 50%
Elkton, MD: #129 of 292 inventorsTop 45%
Maryland: #13,510 of 35,612 inventorsTop 40%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Frank E. Klein has been granted 2 US patents while listed as an inventor at BOE. The first was granted in 1995 and the most recent in June 1996. Frank E. Klein ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Frank E. Klein in Elkton, MD, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5525474 Piperidine analogs and conjugates of procainamide and NAPA Gerald Sigler, Charles F. Walter, Todd P. Glancy, Erasmus Huber 1996-06-11
5439798 Maleimide adduct conjugates of procainamide and NAPA Gerald Sigler, Charles F. Walter, Charles E. Durant, Todd P. Glancy, Allan Dorn 1995-08-08