Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11545289 | Solenoid assembly with included constant-current controller circuit | Randall Shaffer | 2023-01-03 |
| 11203890 | Reduced power consumption electromagnetic lock | Randall Shaffer | 2021-12-21 |
| 10964467 | Solenoid assembly with included constant-current controller circuit | Randall Shaffer | 2021-03-30 |
| 10573450 | Degauss circuit for use in an electronically actuated door lock | Randall Shaffer, Eric R. Anderson | 2020-02-25 |
| 10378242 | Constant-current controller for an inductive load | Randall Shaffer | 2019-08-13 |
| 9509163 | Power control circuit assembly for an electric door latch mechanism | David Corbin, Scott Sullivan, Randall Shaffer, Scott B. Lowder | 2016-11-29 |
| 9308420 | Ball retrieving apparatus | — | 2016-04-12 |
| 7324231 | Printer expansion method and apparatus | Daniel Martin | 2008-01-29 |