Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977922 | Systems and methods for automatically configuring cross-connections in a digital subscriber line access multiplexer (DSLAM) | Timothy J. Tierney, Edward W. Landis, Prakash Easwar | 2005-12-20 |
| 4747040 | Dual operating system computer | David A. Butterfield, Kenneth M. Keverian, Charles S. Kline, Gerald Popek | 1988-05-24 |
| 4744048 | Display context switching arrangement | David A. Butterfield, Kenneth M. Keverian, Charles S. Kline, Gerald Popek | 1988-05-10 |