Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5833199 | Music stand | Eric J. Mueller, David R. Boeddeker, Cindy Louise Weber | 1998-11-10 |
| D388262 | Music stand | Eric J. Mueller, Cindy Louise Weber | 1997-12-30 |
| 5651405 | Portable acoustic shell | David R. Boeddeker, Leslie R. Abraham | 1997-07-29 |
| 5501603 | Modularized visual training aid for classroom instruction | Eric J. Mueller, Leslie R. Abraham, Phillip C. Dretzka | 1996-03-26 |
| D365465 | Workstation that supports keyboards and computer components on an electric piano | John H. Kniefel, Leslie R. Abraham | 1995-12-26 |
| 5464236 | Portable musical instruments cart | Leslie R. Abraham | 1995-11-07 |
| 4918767 | Shampoo chair and bowl apparatus | — | 1990-04-24 |
| 4486106 | Rotary shelf assembly | — | 1984-12-04 |