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

David W. Ritter — 39 Patents

Apple: 10 patents #3,225 of 18,612Top 20%
IAIntersil Americas: 9 patents #57 of 468Top 15%
MIMicrel: 7 patents #23 of 187Top 15%
Sony: 4 patents #9,005 of 25,231Top 40%
FSFairchild Semiconductor: 2 patents #274 of 715Top 40%
VIVideotek: 2 patents #3 of 17Top 20%
RTX (Raytheon): 1 patents #8,290 of 15,912Top 55%
MLMicro Linear: 1 patents #19 of 45Top 45%
CHChrontel: 1 patents #9 of 21Top 45%
San Jose, CA: #1,453 of 32,062 inventorsTop 5%
California: #11,915 of 386,348 inventorsTop 4%
Overall (All Time): #81,245 of 4,157,543Top 2%
39 Patents All Time
David W. Ritter has been granted 39 US patents while listed as an inventor at Apple. The first was granted in 1984 and the most recent in June 2024. David W. Ritter ranks #81,245 of 4,157,543 US inventors in our database (top 2.0%). Patent records list David W. Ritter in San Jose, CA, US.

Patents per Year

Patents granted per year, 1984 to 2024Bar chart with a peak of 5 patents in 2007.peak 51984: 1 patents19841986: 1 patents1987: 1 patents1989: 1 patents19891993: 1 patents1998: 1 patents1999: 1 patents19992000: 1 patents2001: 1 patents2003: 1 patents20032004: 1 patents2005: 1 patents2006: 1 patents20062007: 5 patents2008: 1 patents2009: 1 patents20092012: 1 patents2013: 4 patents2014: 2 patents20142016: 1 patents2017: 2 patents2018: 3 patents20182019: 2 patents2020: 2 patents2021: 1 patents20212024: 1 patents2024

Issued Patents All Time

Showing 1–25 of 39 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12003121 Detection of object location and orientation on a wireless charge mat Chad A. Bossetti, Christopher S. Graham, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam +3 more 2024-06-04 $189,142,000
11159065 Detection of object location and orientation on a wireless charge mat Chad A. Bossetti, Christopher S. Graham, Todd K. Moyer, Steven G. Herbst, Shimon Elkayam +3 more 2021-10-26 $273,635,000
10720789 Wireless charging station David B. Kosecoff, David Samuel Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft +2 more 2020-07-21 $151,096,000
10593291 Methods for color sensing ambient light sensor calibration Zhang Jia, Amy M. Winkler, Christopher S. Erickson, Zhen Zhang 2020-03-17 $72,009,000
10333333 Wireless charging retail systems David B. Kosecoff, David Samuel Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft +2 more 2019-06-25 $85,297,000
10277056 Wireless charging station David B. Kosecoff, David Samuel Kumka, Madhusudanan Keezhveedi Sampath, Steven Charles Michalske, Tavys Q. Ashcroft +2 more 2019-04-30 $88,584,000
10116279 Impedance matching for inductive power transfer systems Jeffrey J. Terlizzi, Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst 2018-10-30 $119,981,000
10031078 Distance sensing by IQ domain differentiation of time of flight (TOF) measurements Itaru Hiromi 2018-07-24
9923383 Adjusting filter in a coupled coil system Jeffrey M. Alves, Todd K. Moyer, Steven G. Herbst 2018-03-20 $80,950,000
9837866 Reducing power dissipation in inductive energy transfer systems Todd K. Moyer, Jeffrey M. Alves, Steven G. Herbst, Jeffrey J. Terlizzi 2017-12-05 $74,042,000
9813041 Automatic boost control for resonant coupled coils 2017-11-07 $107,671,000
9250714 Optical proximity detectors Itaru Hiromi, Philip V. Golden, Pradeep Bhardwaj, Steven G. Herbst, Warren Craddock 2016-02-02 $1,879,000
8872978 Cable equalization and monitoring for degradation and potential tampering Kathryn M. Tucker 2014-10-28 $4,714,000
8760631 Distance sensing by IQ domain differentiation of time of flight (TOF) measurements Itaru Hiromi 2014-06-24 $11,491,000
8558955 Cable equalization locking Warren Craddock, Robert David Zucker 2013-10-15 $1,822,000
8530819 Direct current (DC) correction circuit for a time of flight (TOF) photodiode front end Philip V. Golden, Carl Warren Craddock, Kevin E. Brehmer 2013-09-10 $9,935,000
8451382 Systems and methods for cable equalization Robert David Zucker, Warren Craddock 2013-05-28 $3,669,000
8390740 Systems and methods for cable equalization Robert David Zucker, Warren Craddock 2013-03-05 $3,596,000
8274037 Automatic calibration technique for time of flight (TOF) transceivers Carl Warren Craddock, Philip V. Golden 2012-09-25 $3,599,000
7508179 Dual input prioritized LDO regulator Andrew Cowell 2009-03-24 $2,179,000
7323854 Zero cancellation in multiloop regulator control scheme 2008-01-29 $1,518,000
7298125 Right half-plane zero compensation and cancellation for switching regulators 2007-11-20 $3,014,000
7259521 Video driver architecture for AMOLED displays 2007-08-21 $7,145,000
7248026 Single-pin tracking/soft-start function with timer control 2007-07-24 $3,275,000
7218086 Switching regulator with programmable output levels using a single input pin Bruce Hennig, Ralf Jakobskrueger Muenster 2007-05-15 $8,097,000