Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847768 | Automatic engine oil change indicator system | Donald John Smolenski, John D. Keersmaekers, Christine M. Traylor, Gary J. Wallo | 1989-07-11 |
ES
Ellen S. Schwartz
Overall (1989): #117,075 of 140,708Top 85%
1
Patents 1989