Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Leon Sigal — 32 Patents

IBM: 29 patents #3,540 of 70,183Top 6%
HP: 2 patents #7,666 of 7,018Top 110%
Globalfoundries: 1 patents #2,221 of 4,424Top 55%
Monsey, NY: #4 of 187 inventorsTop 3%
New York: #3,705 of 115,490 inventorsTop 4%
Overall (All Time): #110,428 of 4,157,543Top 3%
32 Patents All Time
Leon Sigal has been granted 32 US patents while listed as an inventor at IBM. The first was granted in 1992 and the most recent in December 2025. Leon Sigal ranks #110,428 of 4,157,543 US inventors in our database (top 2.7%). Patent records list Leon Sigal in Monsey, NY, US.

Patents per Year

Patents granted per year, 1992 to 2025Bar chart with a peak of 4 patents in 2025.peak 41992: 1 patents19921996: 3 patents1997: 1 patents19971998: 3 patents1999: 1 patents19992003: 1 patents2006: 1 patents20062008: 1 patents2009: 2 patents20092011: 1 patents2012: 1 patents20122013: 1 patents2014: 1 patents20142015: 1 patents2017: 1 patents20172018: 1 patents2021: 2 patents20212023: 2 patents2024: 3 patents20242025: 4 patents2025

Issued Patents All Time

Showing 1–25 of 32 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12500144 Backside self aligned skip via Ruinan Xie, Biswanath Senapati, David Wolpert, Nicholas Anthony Lanzillo, Lawrence A. Clevenger +3 more 2025-12-16
12451412 Backside gate via structure using self-aligned scheme Tsung-Sheng Kang, Tao Li, Ruinan Xie 2025-10-21
12381149 Cell optimization through source resistance improvement David Wolpert, Bharat Biyani 2025-08-05
12271674 Generating a power delivery network based on the routing of signal wires within a circuit design David Wolpert, Matthew T. Guzowski, Michael H. Wood 2025-04-08
12176289 Semiconductor device design mitigating latch-up David Wolpert, Terence B. Hook 2024-12-24 $24,905,000
12112114 Hierarchical color decomposition of library cells with boundary-aware color selection David Wolpert, Michael S. Gray, Mitchell R. DeHond 2024-10-08 $24,159,000
11916384 Region-based power grid generation through modification of an initial power grid based on timing analysis David Wolpert, Basanth Jagannathan, Michael H. Wood, James Leland, Alexander J. Suess +2 more 2024-02-27 $9,833,000
11822867 Hierarchical color decomposition of process layers with shape and orientation requirements David Wolpert, Michael S. Gray, Mitchell R. DeHond 2023-11-21 $7,457,000
11663391 Latch-up avoidance for sea-of-gates David Wolpert, Ryan Michael Kruse, Richard Edward Serton, Matthew S. Angyal, Terence B. Hook +1 more 2023-05-30 $4,328,000
11106850 Flexible constraint-based logic cell placement David Wolpert, Timothy A. Schell, Erwin Behnen 2021-08-31 $6,618,000
11074391 Characterizing and simulating library gates to enable identification and elimination of electromigration violations in semiconductor chips David Kadzov, Nagashyamala R. Dhanwada, James D. Warnock 2021-07-27 $4,187,000
9990454 Early analysis and mitigation of self-heating in design flows Nagashyamala R. Dhanwada, William W. Dungan, Arun Joseph, Sungjae Lee, Arjen A. Mets +3 more 2018-06-05 $4,786,000
9552455 Method for an efficient modeling of the impact of device-level self-heating on electromigration limited current specifications Daniel J. Poindexter, Gregory G. Freeman, Siyuranga O. Koswatta, J. Campbell Scott, James D. Warnock 2017-01-24 $6,909,000
9104832 Identifying and mitigating electromigration failures in signal nets of an integrated circuit chip design John E. Barwin, Jason Chung, Amol A. Joshi, William J. Livingstone, Brian Worth +1 more 2015-08-11 $2,160,000
8914765 Power grid generation through modification of an initial power grid based on power grid analysis James D. Warnock 2014-12-16 $3,695,000
8354858 Apparatus and method for hardening latches in SOI CMOS devices Ethan H. Cannon, AJ KleinOsowski, K. Paul Muller, Tak H. Ning, Philip J. Oldiges +2 more 2013-01-15 $8,874,000
8117579 LSSD compatibility for GSD unified global clock buffers James D. Warnock, Wendel Dieter, David E. Lackey, William V. Huott, Louis Bernard Bushard +1 more 2012-02-14 $8,403,000
7888959 Apparatus and method for hardening latches in SOI CMOS devices Ethan H. Cannon, AJ KleinOsowski, K. Paul Muller, Tak H. Ning, Philip J. Oldiges +2 more 2011-02-15 $3,434,000
7589565 Low-power multi-output local clock buffer James D. Warnock, Dieter Wendel 2009-09-15 $26,046,000
7568173 Independent migration of hierarchical designs with methods of finding and fixing opens during migration Veit Gernhoefer, Matthew T. Guzowski, Jason D. Hibbeler, Kevin W. McCullen, Rani Narayan +5 more 2009-07-28 $11,761,000
7456671 Hierarchical scalable high resolution digital programmable delay circuit Charlie C. Hwang, Phillip J. Restle 2008-11-25 $6,627,000
7100144 System and method for topology selection to minimize leakage power during synthesis Hans M. Jacobson, Prabhakar Kudva 2006-08-29 $3,832,000
6629298 Automated programmable process and method for the improvement of electrical digital signal transition rates in a VLSI design Peter J. Camporese, Adam R. Jatkowski, Patrick M. Williams 2003-09-30 $10,221,000
5910730 Digital circuit noise margin improvement 1999-06-08 $54,177,000
5757682 Parallel calculation of exponent and sticky bit during normalization Eric M. Schwarz, Robert M. Bunce, Hung C. Ngo 1998-05-26 $6,589,000