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

Robert A. Sprague — 128 Patents

Xerox: 58 patents #172 of 8,622Top 2%
SISipix Imaging: 26 patents #7 of 91Top 8%
ECE Ink California: 21 patents #6 of 63Top 10%
Amazon: 21 patents #535 of 19,158Top 3%
PIPalo Alto Research Center Incorporated: 1 patents #500 of 776Top 65%
GE: 1 patents #19,940 of 36,430Top 55%
Saratoga, CA: #41 of 2,933 inventorsTop 2%
California: #1,392 of 386,348 inventorsTop 1%
Overall (All Time): #8,696 of 4,157,543Top 1%
128 Patents All Time
Robert A. Sprague has been granted 128 US patents while listed as an inventor at Xerox. The first was granted in 1980 and the most recent in November 2023. Robert A. Sprague ranks #8,696 of 4,157,543 US inventors in our database (top 0.21%). Patent records list Robert A. Sprague in Saratoga, CA, US.

Patents per Year

Patents granted per year, 1992 to 2023Bar chart with a peak of 12 patents in 2014.peak 121992: 1 patents19921993: 1 patents1994: 1 patents1995: 1 patents19951996: 3 patents1997: 2 patents1998: 2 patents19981999: 1 patents2000: 1 patents2001: 1 patents20012002: 3 patents2003: 1 patents2004: 1 patents20042006: 1 patents2008: 1 patents2009: 1 patents20092010: 2 patents2011: 2 patents2012: 8 patents20122013: 8 patents2014: 12 patents2015: 7 patents20152016: 6 patents2017: 4 patents2018: 3 patents20182019: 8 patents2020: 5 patents2021: 3 patents20212022: 1 patents2023: 1 patents2023

Issued Patents All Time

Showing 1–25 of 128 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11815746 Method and apparatus for astigmatic correction in electronically tunable prescription glasses Jim Li, Isabella Talley Lewis 2023-11-14 $323,276,000
11442332 Tunable liquid crystal lens with electrically tunable axis of astigmatism Jim Li, Haiwei Chen 2022-09-13 $276,831,000
11079630 Wide lateral angle frontlight for use with reflective displays Jerry Chung 2021-08-03 $284,422,000
11009762 Borderless display with curved edges Weihsin Hou, Chin Siong Khor, Siddharth Gupta 2021-05-18 $525,641,000
10884260 Dark line compensation in polarized three-dimensional viewing Kari Rinko 2021-01-05 $219,449,000
10802195 High contrast frontlight structures for reflective displays 2020-10-13 $240,479,000
10627694 Hybrid displays including electrophoretic displays and light emitting diodes Ming-Hsiu Wang, Weihsin Hou 2020-04-21 $173,502,000
10578943 Additive particles for improving optical performance of an electrophoretic display Ming Wang, Yu Li, Hui Du, Haiyan Gu, Roman Ivanov +2 more 2020-03-03
10557221 Covers for electronic display elements with improved visibility John Michael Cesaratto, Maung Kyaw Aung 2020-02-11 $118,770,000
10535312 Driving methods and circuit for bi-stable displays Andrew Ho, Yajuan Chen, HongMei Zang, Jialock Wong, Chein Wang 2020-01-14
10288797 Structural alignment features for light emitting diode arrays Eric Gifford Marason, Weihsin Hou, Juho Ilkka Jalava 2019-05-14 $112,016,000
10288974 Borderless display with curved edges Weihsin Hou, Chin Siong Khor, Siddharth Gupta 2019-05-14 $112,016,000
10288973 Borderless display with thin profile Siddharth Gupta, Vikram Srinivas, Wilfrido Loor Canizares 2019-05-14 $112,016,000
10288975 Electrophoretic dispersion including charged pigment particles, uncharged additive nanoparticles, and uncharged neutral density particles Bo Yang, Peter B. Laxton 2019-05-14
10274804 Thin border displays 2019-04-30 $112,773,000
10241377 Self-healing flexible electrophoretic displays Ming-Hsiu Wang, Weihsin Hou, Anoop Menon, Eric Gifford Marason, Yuyan Hua +1 more 2019-03-26 $94,773,000
10228604 Display stack for borderless electronic displays Hany Mounir Ghali, Siddharth Gupta 2019-03-12 $137,472,000
10185200 Thin border displays Angeles Marcia Almanza-Workman, Wilfrido Loor Canizares, Siddharth Gupta, Vikram Srinivas 2019-01-22 $106,811,000
10002575 Driving methods and circuit for bi-stable displays Andrew Ho, Yajuan Chen, HongMei Zang, Jialock Wong, Chein Wang 2018-06-19
9977252 Dark line compensation in polarized three-dimensional viewing Kari Rinko 2018-05-22 $158,140,000
9971151 Mountable clear displays and projection systems Eric Gifford Marason, Suchit Shah, Omar S. Leung, Miguel Virgen 2018-05-15 $78,225,000
9835926 Electrophoretic dispersion Bo Yang, Peter B. Laxton 2017-12-05
9778537 Additive particles for improving optical performance of an electrophoretic display Ming Wang, Yu Li, Hui Du, Xiaojia Zhang, Haiyan Gu +2 more 2017-10-03
9778473 Dark line compensation in polarized three-dimensional viewing 2017-10-03 $51,291,000
9568800 Thin border displays 2017-02-14 $47,349,000