Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7306524 | Method and apparatus for measuring the surface of a golf green | — | 2007-12-11 |
| 6330323 | Enhanced overflow call processing | Louis G. Gottlieb, Cathleen Frazier, Roger P. Engdahl | 2001-12-11 |
| 5617471 | Telecommunications system for transferring a telephone call | Louis G. Gottlieb, Saleem R. Molani, Gregory W. Sedlock, Roger P. Engdahl | 1997-04-01 |
| 5456608 | Cross-connect system | Douglas G. Hard | 1995-10-10 |
| 5243323 | School bus alarm system | — | 1993-09-07 |