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USPTO Patent Rankings Data through Dec 31, 2025
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David C. May — 47 Patents

3M: 22 patents #581 of 11,543Top 6%
Ncr: 13 patents #108 of 3,019Top 4%
DPDell Products: 2 patents #2,475 of 6,820Top 40%
Lockheed Martin: 2 patents #1,607 of 6,507Top 25%
Nortel Networks Limited: 1 patents #2,518 of 5,294Top 50%
ALAgresearch Limited: 1 patents #167 of 547Top 35%
RTX (Raytheon): 1 patents #8,290 of 15,912Top 55%
The Villages, FL: #3 of 66 inventorsTop 5%
Florida: #636 of 67,251 inventorsTop 1%
Overall (All Time): #59,703 of 4,157,543Top 2%
47 Patents All Time
David C. May has been granted 47 US patents while listed as an inventor at 3M. The first was granted in 1982 and the most recent in September 2025. David C. May ranks #59,703 of 4,157,543 US inventors in our database (top 1.4%). Patent records list David C. May in The Villages, FL, US.

Issued Patents All Time

Showing 1–25 of 47 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12406563 Smart surveillance system for swimming pools Ramy R. Gali, Phillip E. Matar 2025-09-02
10964187 Smart surveillance system for swimming pools Ramy R. Gali, Phillip E. Matar 2021-03-30
9875379 System and method for providing user-accessible card slot Charles D. Hood, III 2018-01-23
9837001 Signage overlay article Sithya S. Khieu 2017-12-05 $39,442,000
9396365 System and method for providing user-accessible card slot Charles D. Hood, III 2016-07-19
8624624 Power isolation during sensitive operations Burton Wolfe 2014-01-07 $15,958,000
8525545 Power isolation during sensitive operations Burton Wolfe 2013-09-03 $4,884,000
8176685 Protective sheet made from a blend of ethylene vinyl acetate (EVA) and polyethylene (PE) — 2012-05-15
RE40729 Liquid pavement marking compositions Mark D. Purgett, Mark D. Zender, Daniel J. Willie, Tom R. Borden 2009-06-09
7401736 Card reader — 2008-07-22 $8,480,000
RE40088 Liquid pavement marking compositions Mark D. Purgett, Mark D. Zender, Daniel J. Willie, Tom R. Borden 2008-02-19
6790880 Liquid pavement marking compositions Mark D. Purgett, Mark D. Zender, Daniel J. Willie, Thomas R. Borden 2004-09-14 $16,418,000
6761310 Card reader — 2004-07-13 $14,071,000
6588659 Card reader module — 2003-07-08 $8,564,000
6511259 Particle dispenser with fluid assist to control particle velocity for use on a moving vehicle Sithya S. Khieu, Mark D. Zender, John L. Marty 2003-01-28 $31,704,000
6491216 Security system — 2002-12-10 $11,365,000
6460771 Motorized card reader module — 2002-10-08 $16,401,000
6451874 Liquid pavement marking compositions Mark D. Purgett, Mark D. Zender, Daniel J. Willie, Thomas R. Borden 2002-09-17 $22,279,000
6422475 Self-service terminal — 2002-07-23 $4,950,000
6357657 Anti-fraud device — 2002-03-19 $8,439,000
6292480 Electronic communications manager — 2001-09-18 $53,080,000
6166106 Liquid pavement marking compositions Mark D. Purgett, Mark D. Zender, Daniel J. Willie, Thomas R. Borden 2000-12-26 $48,740,000
6126360 Raised retroreflective pavement marker Sithya S. Khieu, Cristina U. Thomas, Warren J. Johnson, Ronald W. Gerdes, David J. Lundin 2000-10-03 $25,340,000
6000620 Magnetic card reader — 1999-12-14 $8,274,000
5984179 Card reader/writer with pivoting read/write contact head — 1999-11-16 $5,914,000

Nearby-Ranked Inventors

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Sun Lacy47
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Hisashi Kodama47
Sanghyun Park47
Christopher A. Lins47