Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837849 | Stand-up plastic bag and method of making same | Laurence R. Erickson, R. Douglas Behr | 1989-06-06 |
RV
Roger D. Vrooman
Overall (1989): #60,601 of 140,708Top 45%
1
Patents 1989