Inventor

LIEFFORT SETH A

US4 patents

Patents

4 patents

US7119692B2Oct 10, 2006

System for detecting radio-frequency identification tags

3M INNOVATIVE PROPERTIES CO35 citations91

US7421245B2Sep 2, 2008

Field-shaping shielding for radio frequency identification (RFID) system

3M INNOVATIVE PROPERTIES CO27 citations90

US7417599B2Aug 26, 2008

Multi-loop antenna for radio frequency identification (RFID) communication

3M INNOVATIVE PROPERTIES CO20 citations87

US7405663B2Jul 29, 2008

System for detecting radio-frequency identification tags

3M INNOVATIVE PROPERTIES CO8 citations72