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

Thomas D. Howell — 4 Patents

IBM: 3 patents #26,335 of 70,183Top 40%
QUQuantum: 1 patents #325 of 703Top 50%
San Jose, CA: #12,472 of 32,062 inventorsTop 40%
California: #126,026 of 386,348 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Thomas D. Howell has been granted 4 US patents while listed as an inventor at IBM. The first was granted in 1986 and the most recent in June 1995. Thomas D. Howell ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Thomas D. Howell in San Jose, CA, US.

Patents per Year

Patents granted per year, 1986 to 1995Bar chart with a peak of 1 patents in 1986.peak 11986: 1 patents19861987: 1 patents19871990: 1 patents19901995: 1 patents1995

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5422895 Cross-checking for on-the-fly Reed Solomon error correction code Hung C. Nguyen, Bruce R. Peterson 1995-06-06 $5,371,000
4949196 Method and apparatus for asymmetrical RLL coding Neil R. Davie, Martin Hassner, Razmik Karabed, Paul H. Siegel 1990-08-14 $14,475,000
4644564 Decoding the output signal of a partial-response class-IV communication or recording device channel Francois B. Dolivo, Gottfried Ungerboeck 1987-02-17 $16,020,000
4571734 Method and apparatus for decoding the output signal of a partial-response class-IV communication or recording-device channel Francois B. Dolivo, Gottfried Ungerboeck 1986-02-18 $30,256,000