Inventor · disambiguated record
Steven Perry Parfitt
Also filed as: PARFITT STEVEN · PARFITT STEVEN P · PARFITT STEVEN PERRY
7 granted patents·77 citations·filing 1984–2021
83Inventor score
Top patents by PatentIndex Score
7 records- 0188US7646230B2Devices, systems, and methods for reducing signalsSIEMENS INDUSTRY INC·Filed 2008·Granted Jan 12, 2010·26 cites·21 claims
- 0287US8352651B2Devices, systems, and methods regarding programmable logic controller communicationsSIEMENS AG·Filed 2008·Granted Jan 8, 2013·23 cites·21 claims
- 0369US7786919B2Systems and/or devices for providing an isolated analog output or analog inputSIEMENS INDUSTRY INC·Filed 2008·Granted Aug 31, 2010·6 cites·16 claims
- 0467US4618848AAnalog to digital converter circuitTEXAS INSTRUMENTS INC·Filed 1984·Granted Oct 21, 1986·20 cites·6 claims
- 0546US6667705B2Analog to digital converter threshold detection circuitSIEMENS ENERGY & AUTOMATION·Filed 2002·Granted Dec 23, 2003·2 cites·28 claims
- 0643US11824535B2Fail-safe counter evaluator to insure proper counting by a counterSIEMENS INDUSTRY INC·Filed 2018·Granted Nov 21, 2023·0 cites·20 claims
- 0739US12499006B2Functional safety high-speed counter module including diagnostics circuitry for performing counter pattern testSIEMENS AG·Filed 2021·Granted Dec 16, 2025·0 cites·15 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →