Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9571939 | Hearing aid positioning system and structure | Robert J. Fretz, Jean E. Daavettila, Christopher Drake Conger | 2017-02-14 |
| 8605927 | Hearing aid positioning system and structure | Robert J. Fretz, Jean E. Daavettila, Christopher Drake Conger | 2013-12-10 |
| D671218 | Hearing aid body | Jean E. Daavettila, Robert J. Fretz | 2012-11-20 |
| 6790578 | Printing of reflective sheeting | J. Sundar Rajan | 2004-09-14 |
| 5378575 | Printing of reflective sheeting | J. Sundar Rajan | 1995-01-03 |
| 5085918 | Printed retroreflective sheet | J. Sundar Rajan | 1992-02-04 |