Inventor
SIMPKINS JOSEPH A
US10 patents
⚠️ This page may combine multiple inventors who share the name “SIMPKINS JOSEPH A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MARS INC
5 patentsUS5889883AMar 30, 1999
Method and apparatus for optical sensor system and optical interface circuit
MARS INC31 citations91
US5616915AApr 1, 1997
Optical sensor for monitoring the status of a bill magazine in a bill validator
MARS INC50 citations91
US6896116B2May 24, 2005
Bill acceptor
MARS INC42 citations90
US6819781B1Nov 16, 2004
Method and apparatus for optical sensor system and optical interface circuit
MARS INC7 citations72
US5600545AFeb 4, 1997
Apparatus and method for a switching power supply with a power steering clamp
MARS INC4 citations61
USA TECH INC
3 patentsUS9852423B2Dec 26, 2017
Systems and methods for wireless authorization of transactions with mobile payment devices
USA TECH INC9 citations79
US9159182B2Oct 13, 2015
Vending approval systems, methods, and apparatus using card readers
USA TECH INC3 citations60
US9619795B2Apr 11, 2017
Apparatus, system, and methods for retrofitting vending systems with wireless communication
USA TECH INC0 citations45