Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6764016 | Identification method for dip galvanizing | John A. Robertson, Edward S. O'Neal, G. D. Stephen Hudelson | 2004-07-20 |
| 6518542 | Colored patch laser marking | John A. Robertson, Ken R. Vaughn, Edward S. O'Neal | 2003-02-11 |
| 6451421 | Laser markable micro-pore aluminum tags and method of their fabrication | John A. Robertson, Edward S. O'Neal, Ken R. Vaughn | 2002-09-17 |