Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807619 | Resilient shape-retaining fibrous filtration face mask | Harvey J. Berg, Alice C. Murray | 1989-02-28 |
JD
James F. Dyrud
Overall (1989): #100,939 of 140,708Top 75%
1
Patents 1989