Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807619 | Resilient shape-retaining fibrous filtration face mask | James F. Dyrud, Alice C. Murray | 1989-02-28 |
HB
Harvey J. Berg
Overall (1989): #109,032 of 140,708Top 80%
1
Patents 1989