Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6105967 | Combined labyrinth and brush seals for rotary machines | Norman Arnold Turnquist, Robert Harold Cromer, David Robert Skinner, Christopher Edward Wolfe | 2000-08-22 |
| 6045134 | Combined labyrinth and brush seals for rotary machines | Norman Arnold Turnquist, Robert Harold Cromer, David Robert Skinner, Christopher Edward Wolfe | 2000-04-04 |
| 4682934 | Wheel anti-rotation means | Victor J. Knorowski, Charles R. Hean | 1987-07-28 |