Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4237558 | Removable cooling hatband apparatus | Joseph R. Mackenroth, III | 1980-12-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4237558 | Removable cooling hatband apparatus | Joseph R. Mackenroth, III | 1980-12-09 |