Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7423228 | Apparatus for opening an electrical switch responsive to seismic or other event | Cheryl M. Johnson | 2008-09-09 |
| 4779678 | Sucker rod guide | — | 1988-10-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7423228 | Apparatus for opening an electrical switch responsive to seismic or other event | Cheryl M. Johnson | 2008-09-09 |
| 4779678 | Sucker rod guide | — | 1988-10-25 |