Solenoid assembly with included constant-current controller circuit
US-12567526-B2 · Mar 3, 2026 · US
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Shaffer Randall patents
Shaffer Randall is listed as an inventor on 28 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Shaffer Randall |
| Total patents | 28 |
| First publication | Mar 3, 2016 |
| Latest publication | Mar 3, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
Power controller for a door lock and method of conserving power
US-12529243-B2 · Jan 20, 2026 · US
Solid-state degauss circuit for use in an electromagnetic lock
US-2025378981-A1 · Dec 11, 2025 · US
Solenoid assembly actuation using resonant frequency current controller circuit
US-12191076-B2 · Jan 7, 2025 · US
Power controller for a door lock and method of conserving power
US-2024279961-A1 · Aug 22, 2024 · US
Solenoid assembly actuation using resonant frequency current controller circuit
US-2024242870-A1 · Jul 18, 2024 · US
Power controller for a door lock and method of conserving power
US-11993953-B2 · May 28, 2024 · US
Solenoid assembly actuation using resonant frequency current controller circuit
US-11915869-B2 · Feb 27, 2024 · US
Solenoid assembly with included constant-current controller circuit
US-2023126500-A1 · Apr 27, 2023 · US
Solenoid assembly with included constant-current controller circuit
US-11545289-B2 · Jan 3, 2023 · US
Recent patents
Latest publications not already listed above.
Solenoid assembly actuation using resonant frequency current controller circuit
US-2022384076-A1 · Dec 1, 2022 · US
Solenoid assembly actuation using resonant frequency current controller circuit
US-11424061-B2 · Aug 23, 2022 · US
Reduced power consumption electromagnetic lock
US-11203890-B2 · Dec 21, 2021 · US
Reduced power consumption electromagnetic lock
US-2021317691-A1 · Oct 14, 2021 · US
Solenoid assembly with included constant-current controller circuit
US-10964467-B2 · Mar 30, 2021 · US
Solenoid assembly with included constant-current controller circuit
US-2021043351-A1 · Feb 11, 2021 · US
Solenoid assembly actuation using resonant frequency current controller circuit
US-2021043352-A1 · Feb 11, 2021 · US
Power controller for a door lock and method of conserving power
US-2021010294-A1 · Jan 14, 2021 · US
Power controller for a door lock and method of conserving power
US-10815695-B2 · Oct 27, 2020 · US
Degauss circuit for use in an electronically actuated door lock
US-10573450-B2 · Feb 25, 2020 · US
Solenoid assembly with included constant-current controller circuit
US-2019267173-A1 · Aug 29, 2019 · US
Constant-current controller for an inductive load
US-10378242-B2 · Aug 13, 2019 · US
Degauss circuit for use in an electronically actuated door lock
US-2018075961-A1 · Mar 15, 2018 · US
Reduced power consumption electromagnetic lock
US-2017226784-A1 · Aug 10, 2017 · US
Power control circuit assembly for an electric door latch mechanism
US-9509163-B2 · Nov 29, 2016 · US
Constant-current controller for an inductive load
US-2016307683-A1 · Oct 20, 2016 · US
Power controller for a door lock and method of conserving power
US-2016307681-A1 · Oct 20, 2016 · US
Power control circuit assembly for an electric door latch mechanism
US-2016060902-A1 · Mar 3, 2016 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Hanchett Entry Systems Inc | 28 |
| Hanchett Entry System Inc | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| H01F7/064 | 19 |
| E05B47/0001 | 7 |
| E05B2047/0054 | 7 |
| E05C19/166 | 6 |
| E05B47/00 | 6 |