Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802105 | Spring balance assembly | Allen D. Polowinczak, Mark V. Murphy | 2004-10-12 |
| 6751904 | Balance system for sash window assembly | Richard A. Gardner, Steven E. Schultz, Mark V. Murphy, Vincent Eslick, George E. Heid | 2004-06-22 |