Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5234281 | Deflection indicating adjustable highway straight-edge | David W. Somero, William W. Niemela, Philip J. Quenzi | 1993-08-10 |
| 4930935 | Screeding apparatus and method | Philip J. Quenzi, David W. Somero | 1990-06-05 |
| 4655633 | Screeding apparatus and method | David W. Somero, Philip J. Quenzi | 1987-04-07 |