Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6067848 | Portable tire uniformity measurement system and method | James F. Siegfried, William P. Stanfield, Gregory D. Chaplin | 2000-05-30 |
| 5479974 | Noise-reduction system for vehicle tires | Gary C. Noggle | 1996-01-02 |
| 5448910 | Portable tire uniformity test machine | Martin A. Yurjevich, David A. Johnson, James F. Siegfried, William P. Stanfield | 1995-09-12 |
| 5244316 | Borer-resistant waterfront retaining bulkhead | William Wright | 1993-09-14 |
| 4473125 | Insert for drill bits and drill stabilizers | Larry S. Addudle | 1984-09-25 |