Assignee
DUNCAN IND PARKING CONTROL SYS
US·11 granted patents·1,099 citations·filing 1988–1997
Top patents by PatentIndex Score
11 records- 0194US5155614ALow-power demodulating receiver with amplifier stages sharing the same bias currentDUNCAN IND PARKING CONTROL SYS·Filed 1991·Granted Oct 13, 1992·102 cites·15 claims
- 0293US4880406AMeter handle mechanismDUNCAN IND PARKING CONTROL SYS·Filed 1988·Granted Nov 14, 1989·53 cites·3 claims
- 0387US5382780APortable time metering deviceDUNCAN IND PARKING CONTROL SYS·Filed 1993·Granted Jan 17, 1995·89 cites·20 claims
- 0487US5244070ADual coil coin sensing apparatusDUNCAN IND PARKING CONTROL SYS·Filed 1992·Granted Sep 14, 1993·134 cites·30 claims
- 0586US5273151AResonant coil coin detection apparatusDUNCAN IND PARKING CONTROL SYS·Filed 1992·Granted Dec 28, 1993·125 cites·13 claims
- 0685US5526662ACashless key and receptacle systemDUNCAN IND PARKING CONTROL SYS·Filed 1993·Granted Jun 18, 1996·73 cites·31 claims
- 0783US5806651ACoin discrimination systemDUNCAN IND PARKING CONTROL SYS·Filed 1996·Granted Sep 15, 1998·126 cites·9 claims
- 0879US5109972ACoin operated timing mechanismDUNCAN IND PARKING CONTROL SYS·Filed 1989·Granted May 5, 1992·91 cites·46 claims
- 0972US5841369AParking meter with peripheral functionsDUNCAN IND PARKING CONTROL SYS·Filed 1997·Granted Nov 24, 1998·160 cites·10 claims
- 1071US5184707ACoin operated timing mechanismDUNCAN IND PARKING CONTROL SYS·Filed 1992·Granted Feb 9, 1993·64 cites·4 claims
- 1162US5805083AElectronic parking meter operating systemDUNCAN IND PARKING CONTROL SYS·Filed 1997·Granted Sep 8, 1998·82 cites·4 claims
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