Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847987 | Method of making a core and coil assembly | — | 1989-07-18 |
| 4814736 | Wound transformer core | Albert Lee | 1989-03-21 |
DB
Donald E. Ballard
Overall (1989): #28,968 of 140,708Top 25%
2
Patents 1989