Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317960 | Telephone-conferencing and inquiry-handling apparatus and method | John M. Harrison | 1982-03-02 |
| 4317961 | Telephone-conferencing apparatus and method | — | 1982-03-02 |
| 4303804 | Telephone-conferencing apparatus and method having line location | John M. Harrison | 1981-12-01 |
| 4295008 | Telephone-conferencing apparatus and method having response tallying | Richard G. McGurk, John M. Harrison | 1981-10-13 |