Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7807920 | Concentrated solar photovoltaic module | Edward J. Linke | 2010-10-05 |
| 4821319 | Single line telephone communication system | David A. Zeller, Jr. | 1989-04-11 |
| 4782480 | Telephone line access apparatus | Franklin Hargrave, David A. Zeller, Jr. | 1988-11-01 |
| 4750170 | Line access apparatus for in-band communication | David A. Zeller, Jr., Franklin Hargrave | 1988-06-07 |
| 4672602 | Control and routing system | Franklin Hargrave | 1987-06-09 |
| 4665516 | Information transport system employing telephone lines | Franklin Hargrave, John E. Cox | 1987-05-12 |
| 4656651 | System for providing remote services | David S Evans, Mark G. Smith, Franklin Hargrave | 1987-04-07 |
| 4654869 | Information collecting and forwarding apparatus | Mark G. Smith, Karen J. French, David A. Zeller, Jr., Franklin Hargrave | 1987-03-31 |
| 4646342 | Test trunk access controller | Franklin Hargrave, David A. Zeller, Jr., Mark G. Smith, William L. Hull | 1987-02-24 |
| 4638124 | Key telephone system with distributed control | Franklin Hargrave | 1987-01-20 |
| 4608460 | Comprehensive automatic directory assistance apparatus and method thereof | Nicholas Carter, Walter Guilarte, Ravindra T. Masand, Terrance Martin, Santanu Das | 1986-08-26 |
| 4602363 | Expansion apparatus for use in communication systems | Santanu Das, Nicholas Carter | 1986-07-22 |
| 4602362 | Information transport system | Franklin Hargrave, Santanu Das | 1986-07-22 |
| 4601029 | Communication switching system | Franklin Hargrave | 1986-07-15 |
| 4589107 | Simultaneous voice and data communication and data base access in a switching system using a combined voice conference and data base processing module | Santanu Das, Nicholas Carter | 1986-05-13 |
| 4584680 | Use of a tone bus to provide polling and data distribution apparatus for communication system terminal groups | Nicholas Carter, Santanu Das | 1986-04-22 |
| 4583215 | Telephone line access system for main distribution frame | Franklin Hargrave, Edward J. Linke | 1986-04-15 |
| 4578789 | Simultaneous voice and data communication and data base access in a switching system using a tone bus or broadcast mode | Nicholas Carter, Santanu Das | 1986-03-25 |
| 4575840 | Telephone line access device for main distribution frame | Franklin Hargrave, Edward J. Linke | 1986-03-11 |
| 4528424 | Multiparty line adapter with privacy feature controlled by reversal of line polarity at a central power source | Santanu Das, Franklin Hargrave | 1985-07-09 |
| 4488287 | Combining and splitting of voice and data from multiple terminal sources and electronic PABX for same | Nicholas Carter, Santanu Das | 1984-12-11 |