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

Carl A. Hassell — 1 Patent

IBM: 1 patents #44,878 of 70,183Top 65%
Tucson, AZ: #3,413 of 6,004 inventorsTop 60%
Arizona: #18,529 of 32,909 inventorsTop 60%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Carl A. Hassell has been granted 1 US patent while listed as an inventor at IBM. All of these patents were granted in 1994. Carl A. Hassell ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Carl A. Hassell in Tucson, AZ, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5369652 Error detection and correction having one data format recordable on record media using a diverse number of concurrently recorded tracks Charles E. Bailey, Ernest S. Gale, Scott J. Schaffer, Sushama M. Paranjape, Stephen C. West 1994-11-29 $21,326,000