Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10382657 | Methods, systems, and products for alternate audio sources | Robert Koch | 2019-08-13 |
| 9264586 | Methods, systems, and products for alternate audio sources | Robert Koch | 2016-02-16 |
| 9049406 | Methods, systems, and products for alternate audio sources | Robert Koch | 2015-06-02 |
| 8856824 | Methods, systems, and products for alternate audio sources | Robert Koch | 2014-10-07 |
| 8272008 | Methods, systems, and products for retrieving audio signals | Robert Koch | 2012-09-18 |