Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5955372 | Detection of concrete deterioration by staining | George D. Guthrie, Jr. | 1999-09-21 |
| 5739035 | Detection of alkali-silica reaction swelling in concrete by staining | George D. Guthrie, Jr. | 1998-04-14 |