Inventor · disambiguated record
David C. May
Also filed as: MAY DAVID · MAY DAVID C · MAY DAVID C C
47 granted patents·6 pending applications·1,685 citations·filing 1981–2021
99Inventor score
Top patents by PatentIndex Score
53 records- 0196US6451874B1Liquid pavement marking compositions3M INNOVATIVE PROPERTIES CO·Filed 2000·Granted Sep 17, 2002·67 cites·10 claims
- 0296US5677050ARetroreflective sheeting having an abrasion resistant ceramer coatingMINNESOTA MINING & MFG·Filed 1995·Granted Oct 14, 1997·181 cites·25 claims
- 0393US5774265ADurable retroreflective elementsMINNESOTA MINING & MFG·Filed 1996·Granted Jun 30, 1998·87 cites·25 claims
- 0493US5417515ARetroreflective article with dual reflectorMINNESOTA MINING & MFG·Filed 1994·Granted May 23, 1995·70 cites·17 claims
- 0593US4875798ARetroreflective pavement markerMINNESOTA MINING & MFG·Filed 1988·Granted Oct 24, 1989·80 cites·11 claims
- 0690US6166106ALiquid pavement marking compositions3M INNOVATIVE PROPERTIES CO·Filed 1998·Granted Dec 26, 2000·49 cites·38 claims
- 0788US4719621APacket fastbusRAYTHEON CO·Filed 1985·Granted Jan 12, 1988·94 cites·24 claims
- 0888US4418110AVapor-permeable retroreflective sheetingMINNESOTA MINING & MFG·Filed 1982·Granted Nov 29, 1983·43 cites·17 claims
- 0985US8525545B1Power isolation during sensitive operationsMAY DAVID·Filed 2012·Granted Sep 3, 2013·20 cites·21 claims
- 1085US6292480B1Electronic communications managerNORTEL NETWORKS LTD·Filed 1997·Granted Sep 18, 2001·167 cites·13 claims
- 1185US5816305AProtective cover having a non-woven absorbent layerD C MAY CORP·Filed 1995·Granted Oct 6, 1998·52 cites·1 claims
- 1285US5667335AFiber reinforced raised pavement marker and method of makingMINNESOTA MINING & MFG·Filed 1995·Granted Sep 16, 1997·58 cites·28 claims
- 1383US4521129AElastomeric pavement marker having improved configurationMINNESOTA MINING & MFG·Filed 1983·Granted Jun 4, 1985·50 cites·10 claims
- 1482US6491216B1Security systemNCR CORP·Filed 2000·Granted Dec 10, 2002·73 cites·22 claims
- 1582US5310278APavement markers with silicone adhesiveMINNESOTA MINING & MFG·Filed 1992·Granted May 10, 1994·44 cites·3 claims
- 1680US6790880B2Liquid pavement marking compositions3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Sep 14, 2004·12 cites·39 claims
- 1780US6422475B1Self-service terminalNCR CORP·Filed 2000·Granted Jul 23, 2002·54 cites·26 claims
- 1880US4534673AElastomeric pavement markerMINNESOTA MINING & MFG·Filed 1983·Granted Aug 13, 1985·38 cites·9 claims
- 1979US5835271AEncased retroreflective elements and method for makingMINNESOTA MINING & MFG·Filed 1995·Granted Nov 10, 1998·49 cites·16 claims
- 2078US5391015APavement markers with silicone adhesiveMINNESOTA MINING & MFG·Filed 1993·Granted Feb 21, 1995·37 cites·20 claims
- 2175US8624624B1Power isolation during sensitive operationsLOCKHEED CORP·Filed 2012·Granted Jan 7, 2014·5 cites·28 claims
- 2273US7401736B2Card readerNCR CORP·Filed 2005·Granted Jul 22, 2008·5 cites·16 claims
- 2373US5571362AMethod for making retroreflective article with dual reflectorsMINNESOTA MINING & MFG·Filed 1995·Granted Nov 5, 1996·27 cites·12 claims
- 2472US6588659B2Card reader moduleNCR CORP·Filed 2001·Granted Jul 8, 2003·15 cites·17 claims
- 2571US6357657B1Anti-fraud deviceNCR CORP·Filed 2000·Granted Mar 19, 2002·23 cites·18 claims
- 2671US6126360ARaised retroreflective pavement marker3M INNOVATIVE PROPERTIES CO·Filed 1996·Granted Oct 3, 2000·38 cites·4 claims
- 2770USRE40729ELiquid pavement marking compositions3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Jun 9, 2009·6 cites·51 claims
- 2870US6460771B1Motorized card reader moduleNCR CORP·Filed 2000·Granted Oct 8, 2002·21 cites·22 claims
- 2970US5721420AShutter control mechanismNCR CORP·Filed 1996·Granted Feb 24, 1998·37 cites·5 claims
- 3070US4648689APavement marking tapeMINNESOTA MINING & MFG·Filed 1985·Granted Mar 10, 1987·30 cites·6 claims
- 3169US9396365B2System and method for providing user-accessible card slotHOOD III CHARLES D·Filed 2009·Granted Jul 19, 2016·3 cites·20 claims
- 3267US6761310B2Card readerNCR CORP·Filed 2002·Granted Jul 13, 2004·11 cites·13 claims
- 3364US2010299984A1Signage including interlocking mechanical fasteners3M INNOVATIVE PROPERTIES CO·Filed 2009·Application pending·0 cites
- 3463USD311704SPavement markerMINNESOTA MINING & MFG·Filed 1988·Granted Oct 30, 1990·9 cites·1 claims
- 3558US9837001B2Signage overlay article3M INNOVATIVE PROPERTIES CO·Filed 2013·Granted Dec 5, 2017·0 cites·14 claims
- 3656US9875379B2System and method for providing user-accessible card slotDELL PRODUCTS LP·Filed 2016·Granted Jan 23, 2018·0 cites·17 claims
- 3756USRE40088ELiquid pavement marking compositions3M INNOVATIVE PROPERTIES CO·Filed 2004·Granted Feb 19, 2008·3 cites·14 claims
- 3854US2014259830A1Multi-panel sign systems and methods3M INNOVATIVE PROPERTIES CO·Filed 2013·Application pending·0 cites
- 3953US5828043ACard reader system including an invalidating deviceNCR CORP·Filed 1996·Granted Oct 27, 1998·19 cites·4 claims
- 4052US8176685B2Protective sheet made from a blend of ethylene vinyl acetate (EVA) and polyethylene (PE)MAY DAVID·Filed 2007·Granted May 15, 2012·4 cites·17 claims
- 4152US4626127AElastomeric pavement markerMAY DAVID C·Filed 1985·Granted Dec 2, 1986·19 cites·8 claims
- 4250US5984179ACard reader/writer with pivoting read/write contact headNCR CORP·Filed 1997·Granted Nov 16, 1999·27 cites·12 claims
- 4348US5760380AShutter mechanism for card controlled self-service transaction terminalNCR CORP·Filed 1996·Granted Jun 2, 1998·24 cites·7 claims
- 4447US6511259B1Particle dispenser with fluid assist to control particle velocity for use on a moving vehicle3M INNOVATIVE PROPERTIES CO·Filed 1999·Granted Jan 28, 2003·15 cites·43 claims
- 4545US5929426AMagnetic card sensor for sensing presence of a card having a magnetic stripe and thickness complying with ISO standardNCR CORP·Filed 1997·Granted Jul 27, 1999·11 cites·6 claims
- 4641US2014115319A1Application layer encrypted packet routingLOCKHEED CORP·Filed 2013·Application pending·0 cites
- 4739US2017028773A1Process for Creating Three-Dimensional Aluminum ArtworkMAY DAVID·Filed 2015·Application pending·0 cites
- 4838US6000620AMagnetic card readerNCR CORP·Filed 1997·Granted Dec 14, 1999·6 cites·20 claims
- 4938US2003136859A1Method of applying two-component pavement markings and apparatus3M INNOVATIVE PROPERTIES CO·Filed 2002·Application pending·0 cites
- 5035US10964187B2Smart surveillance system for swimming poolsPOOL KNIGHT LLC·Filed 2020·Granted Mar 30, 2021·0 cites·19 claims
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →