Inventor
SUTTON JOSEPH H
US4 patents
Patents
4 patentsUS5841369ANov 24, 1998
Parking meter with peripheral functions
DUNCAN IND PARKING CONTROL SYS160 citations97
US5805083ASep 8, 1998
Electronic parking meter operating system
DUNCAN IND PARKING CONTROL SYS82 citations94
US5806651ASep 15, 1998
Coin discrimination system
DUNCAN IND PARKING CONTROL SYS126 citations93
US5526662AJun 18, 1996
Cashless key and receptacle system
DUNCAN IND PARKING CONTROL SYS73 citations89