Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9332122 | System and method for identifying E-911 calls and notifying family members/friends of the caller | John Zeigler, Cadathur V. Chakravarthy | 2016-05-03 |
| 8548152 | System and method for handling toll free number telephone calls | John Zeigler, Jennifer Stilgenbauer | 2013-10-01 |
| 8355494 | System and method for handling toll free number telephone calls | John Zeigler, Jennifer Stilgenbauer | 2013-01-15 |