Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D654386 | Noise monitor with red surface lighting | Philip J. Battenberg, Michael G. Wurm, Patrick J. Kilps, Thomas E. King, Jeffrey M. Smits | 2012-02-21 |
| D648643 | Noise monitor | Philip J. Battenberg, Michael G. Wurm, Patrick J. Kilps, Thomas E. King, Jeffrey M. Smits | 2011-11-15 |
| 5836303 | Respirator apparatus | Wendell Hurst, Robert Metzger, Frederick D. Walker | 1998-11-17 |