Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D402971 | Keyboard support assembly | Kenneth J. Kirchhoff, Robert Wolf, Lawrence J. Fenske | 1998-12-22 |
| 5823487 | Keyboard support assembly | Kenneth J. Kirchhoff, Robert Wolf, James J. Frater, Lawrence J. Fenske | 1998-10-20 |
| D396708 | Keyboard support assembly | Kenneth J. Kirchhoff, Robert Wolf, Lawrence J. Fenske | 1998-08-04 |
| D387744 | Keyboard support assembly | Kenneth J. Kirchhoff, Robert Wolf, Lawrence J. Fenske | 1997-12-16 |
| 5206914 | Electrostatic acoustic transducer having extremely thin diaphragm substrate | Neil K. Fortney | 1993-04-27 |