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USPTO Patent Rankings Data through Sept 30, 2025
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Derek Roskell — 9 Patents

TITexas Instruments: 9 patents #1,613 of 12,488Top 15%
Overall (All Time): #590,795 of 4,157,543Top 15%
9 Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
5668482 Bus maintenance circuit 1997-09-16
5446651 Split multiply operation Phillip Moyse, Richard Simpson 1995-08-29
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
5173904 Logic circuits systems, and methods having individually testable logic modules Martin D. Daniels 1992-12-22
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
4860290 Logic circuit having individually testable logic modules Martin D. Daniels 1989-08-22
4858167 Parallel binary adder having grouped stages including dynamic logic to increase carry propagation speed Richard Simpson 1989-08-15
4544851 Synchronizer circuit with dual input Marvin C. Conrad, Karl M. Guttag, John V. Schabowski, Jim Carey, Brian Shore 1985-10-01
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