Inventor · disambiguated record
Ralph H. Carmen
Also filed as: CARMEN RALPH · CARMEN RALPH H
20 granted patents·1,527 citations·filing 1982–2000
97Inventor score
Files withDUNCAN IND PARKING CONTROL SYS9DUNCAN IND PARKING CONTROL COR2SUPERIOR ELECTRIC CO2TECHNICARE CORP2DSC COMMUNICATIONS1
Top patents by PatentIndex Score
20 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
- 0294US4734779AVideo projection systemVIDEO MATRIX CORP·Filed 1987·Granted Mar 29, 1988·129 cites·15 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
- 0683US6230868B1System for metering multiple parking spacesDUNCAN IND INC·Filed 2000·Granted May 15, 2001·155 cites·12 claims
- 0783US5806651ACoin discrimination systemDUNCAN IND PARKING CONTROL SYS·Filed 1996·Granted Sep 15, 1998·126 cites·9 claims
- 0881US5119916ASensor for measuring the magnetically responsive characteristics of tokensDUNCAN IND PARKING CONTROL COR·Filed 1990·Granted Jun 9, 1992·78 cites·14 claims
- 0979US5109972ACoin operated timing mechanismDUNCAN IND PARKING CONTROL SYS·Filed 1989·Granted May 5, 1992·91 cites·46 claims
- 1079US4866382AMagnetic rotary encoder system having a multi-element magnetoresistive sensorSUPERIOR ELECTRIC CO·Filed 1987·Granted Sep 12, 1989·33 cites·13 claims
- 1177US5060777ALow-power device for sorting tokensDUNCAN IND PARKING CONTROL COR·Filed 1990·Granted Oct 29, 1991·70 cites·9 claims
- 1272US5841369AParking meter with peripheral functionsDUNCAN IND PARKING CONTROL SYS·Filed 1997·Granted Nov 24, 1998·160 cites·10 claims
- 1371US5184707ACoin operated timing mechanismDUNCAN IND PARKING CONTROL SYS·Filed 1992·Granted Feb 9, 1993·64 cites·4 claims
- 1471US4904995AIntegrated remote electricity meter transponder and combinationEMERSON ELECTRIC CO·Filed 1986·Granted Feb 27, 1990·38 cites·2 claims
- 1568US4853631AMagnetoresistive sensor having inter-leaved magnetoresistive elements for detecting encoded magnetic informationSUPERIOR ELECTRIC CO·Filed 1987·Granted Aug 1, 1989·16 cites·6 claims
- 1662US5805083AElectronic parking meter operating systemDUNCAN IND PARKING CONTROL SYS·Filed 1997·Granted Sep 8, 1998·82 cites·4 claims
- 1746US4412249AUltrasonic image storage device and methodTECHNICARE CORP·Filed 1982·Granted Oct 25, 1983·9 cites·15 claims
- 1843US4412248AUltrasonic image storage device and methodTECHNICARE CORP·Filed 1982·Granted Oct 25, 1983·8 cites·15 claims
- 1938US5139128AChute for controlling the motion of a token moving by gravity through a token-receiving deviceDUNCAN IND PARKING CONTROL·Filed 1990·Granted Aug 18, 1992·13 cites·7 claims
- 2035US5018131AOptical switchDSC COMMUNICATIONS·Filed 1989·Granted May 21, 1991·5 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →