Inventor

KIEFFER MICHAEL J

US9 patents

⚠️ This page may combine multiple inventors who share the name “KIEFFER MICHAEL J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

3M INNOVATIVE PROPERTIES CO

5 patents

US6369709B1Apr 9, 2002

Method and apparatus for activating and deactivating electromagnetic article surveillance markers

3M INNOVATIVE PROPERTIES CO12 citations73

US8002182B2Aug 23, 2011

System for processing financial transactions in a self-service library terminal

3M INNOVATIVE PROPERTIES CO2 citations61

MINNESOTA MINING & MFG

3 patents

US6542070B1Apr 1, 2003

Terminal for libraries and the like

MINNESOTA MINING & MFG3 citations72

US6464138B1Oct 15, 2002

Terminal for libraries and the like

MINNESOTA MINING & MFG6 citations72

US6549141B1Apr 15, 2003

Terminal for libraries and the like

MINNESOTA MINING & MFG0 citations51

FERGEN JAMES E

1 patent

US8322614B2Dec 4, 2012

System for processing financial transactions in a self-service library terminal

FERGEN JAMES E2 citations56