Inventor
HAYES STEPHEN J
GB6 patents
Patents
6 patentsUS5351798AOct 4, 1994
Coin discrimination apparatus and method
PROTEL INC67 citations94
US6301344B1Oct 9, 2001
Intelligent public telephone system and method
PROTEL INC46 citations92
US5191957AMar 9, 1993
Coin discrimination method
PROTEL INC30 citations90
US5568854AOct 29, 1996
Coin discrimination method
PROTEL INC19 citations89
US5687830ANov 18, 1997
Item discrimination apparatus and method
PROTEL INC16 citations78
US6850607B2Feb 1, 2005
Intelligent vending system and method
PROTEL INC10 citations69