Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Derek Roskell — 9 Patents

TITexas Instruments: 9 patents #1,623 of 12,488Top 15%
Gosport, GB: #10 of 116 inventorsTop 9%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Derek Roskell has been granted 9 US patents while listed as an inventor at Texas Instruments. The first was granted in 1985 and the most recent in September 1997. Derek Roskell ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Derek Roskell in Gosport, GB.

Patents per Year

Patents granted per year, 1985 to 1997Bar chart with a peak of 2 patents in 1985.peak 21985: 2 patents19851989: 2 patents19891992: 2 patents19921993: 1 patents19931995: 1 patents19951997: 1 patents1997

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5668482 Bus maintenance circuit 1997-09-16 $32,287,000
5446651 Split multiply operation Phillip Moyse, Richard Simpson 1995-08-29 $10,443,000
5249266 Data processing apparatus with self-emulation capability Thomas A. Dye, Richard Simpson, Michael D. Asal, Karl M. Guttag, Neil Tebbutt +1 more 1993-09-28 $7,109,000
5173904 Logic circuits systems, and methods having individually testable logic modules Martin D. Daniels 1992-12-22 $3,532,000
5140687 Data processing apparatus with self-emulation capability Thomas A. Dye, Richard Simpson, Michael D. Asal, Karl M. Guttag, Neil Tebbutt +1 more 1992-08-18 $1,759,000
4860290 Logic circuit having individually testable logic modules Martin D. Daniels 1989-08-22 $2,141,000
4858167 Parallel binary adder having grouped stages including dynamic logic to increase carry propagation speed Richard Simpson 1989-08-15 $1,155,000
4544851 Synchronizer circuit with dual input Marvin C. Conrad, Karl M. Guttag, John V. Schabowski, Jim Carey, Brian Shore 1985-10-01 $2,804,000
4532587 Single chip processor connected to an external memory chip John V. Schabowski, Karl M. Guttag, Kevin C. McDonough, Brian Shore, Thomas J. Preston 1985-07-30 $16,236,000