Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4604247 | Tower packing material and method | Gilbert K. Chen, Donald L. Glaspie, John R. Axe | 1986-08-05 |
| 4519960 | Expanded metal saddle tower packing | Donald L. Glaspie | 1985-05-28 |