Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5309312 | Overcurrent protection relay with communications | Sidney B. Harden, Richard A. Freeman | 1994-05-03 |
| 5014153 | Transformer differential relay | — | 1991-05-07 |
| 4845594 | Reclosing relay with nonvolatile memory of operations | — | 1989-07-04 |
| 4788619 | Protective relays and methods | Matthew J. Ott | 1988-11-29 |
| 4757416 | Protective apparatus, methods of operating same and phase window adjusting apparatus for use therein | — | 1988-07-12 |
| 4467144 | Telephone annuciator extender | Edward B. Learned | 1984-08-21 |