Inventor · disambiguated record
Randall Shaffer
Also filed as: SHAFFER RANDALL · SHAFFER RANDALL A
12 granted patents·2 pending applications·62 citations·filing 1998–2024
88Inventor score
Files withHANCHETT ENTRY SYSTEMS INC13
Top patents by PatentIndex Score
14 records- 0195US11424061B2Solenoid assembly actuation using resonant frequency current controller circuitHANCHETT ENTRY SYSTEMS INC·Filed 2020·Granted Aug 23, 2022·8 cites·22 claims
- 0290US10815695B2Power controller for a door lock and method of conserving powerHANCHETT ENTRY SYSTEMS INC·Filed 2016·Granted Oct 27, 2020·4 cites·5 claims
- 0387US11993953B2Power controller for a door lock and method of conserving powerHANCHETT ENTRY SYSTEMS INC·Filed 2020·Granted May 28, 2024·2 cites·10 claims
- 0481US10573450B2Degauss circuit for use in an electronically actuated door lockHANCHETT ENTRY SYSTEMS INC·Filed 2017·Granted Feb 25, 2020·2 cites·13 claims
- 0580US11915869B2Solenoid assembly actuation using resonant frequency current controller circuitHANCHETT ENTRY SYSTEMS INC·Filed 2022·Granted Feb 27, 2024·0 cites·21 claims
- 0680US9509163B2Power control circuit assembly for an electric door latch mechanismHANCHETT ENTRY SYSTEMS INC·Filed 2015·Granted Nov 29, 2016·4 cites·28 claims
- 0779US12191076B2Solenoid assembly actuation using resonant frequency current controller circuitHANCHETT ENTRY SYSTEMS INC·Filed 2024·Granted Jan 7, 2025·0 cites·26 claims
- 0875US5969499AController for AC motorFiled 1998·Granted Oct 19, 1999·40 cites·15 claims
- 0969US10378242B2Constant-current controller for an inductive loadHANCHETT ENTRY SYSTEMS INC·Filed 2016·Granted Aug 13, 2019·1 cites·9 claims
- 1068US11545289B2Solenoid assembly with included constant-current controller circuitHANCHETT ENTRY SYSTEMS INC·Filed 2020·Granted Jan 3, 2023·0 cites·17 claims
- 1163US2021317691A1Reduced power consumption electromagnetic lockHANCHETT ENTRY SYSTEMS INC·Filed 2021·Application pending·0 cites
- 1258US11203890B2Reduced power consumption electromagnetic lockHANCHETT ENTRY SYSTEMS INC·Filed 2016·Granted Dec 21, 2021·1 cites·16 claims
- 1357US10964467B2Solenoid assembly with included constant-current controller circuitHANCHETT ENTRY SYSTEMS INC·Filed 2019·Granted Mar 30, 2021·0 cites·8 claims
- 1457US2025378981A1Solid-state degauss circuit for use in an electromagnetic lockHANCHETT ENTRY SYSTEMS INC·Filed 2024·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →