Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4782480 | Telephone line access apparatus | Francisco A. Middleton, David A. Zeller, Jr. | 1988-11-01 |
| 4750170 | Line access apparatus for in-band communication | David A. Zeller, Jr., Francisco A. Middleton | 1988-06-07 |
| 4672602 | Control and routing system | Francisco A. Middleton | 1987-06-09 |
| 4665516 | Information transport system employing telephone lines | Francisco A. Middleton, John E. Cox | 1987-05-12 |
| 4656651 | System for providing remote services | David S Evans, Mark G. Smith, Francisco A. Middleton | 1987-04-07 |
| 4654869 | Information collecting and forwarding apparatus | Mark G. Smith, Karen J. French, David A. Zeller, Jr., Francisco A. Middleton | 1987-03-31 |
| 4646342 | Test trunk access controller | David A. Zeller, Jr., Mark G. Smith, William L. Hull, Francisco A. Middleton | 1987-02-24 |
| 4638124 | Key telephone system with distributed control | Francisco A. Middleton | 1987-01-20 |
| 4602362 | Information transport system | Francisco A. Middleton, Santanu Das | 1986-07-22 |
| 4601029 | Communication switching system | Francisco A. Middleton | 1986-07-15 |
| 4583215 | Telephone line access system for main distribution frame | Edward J. Linke, Francisco A. Middleton | 1986-04-15 |
| 4575840 | Telephone line access device for main distribution frame | Edward J. Linke, Francisco A. Middleton | 1986-03-11 |
| 4528424 | Multiparty line adapter with privacy feature controlled by reversal of line polarity at a central power source | Francisco A. Middleton, Santanu Das | 1985-07-09 |