Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872505 | Heat sink for an electronic device | Jack E. Jones | 1989-10-10 |
| 4864488 | Single level D.C. output voltage power supply | David Schaffner | 1989-09-05 |
DB
David J. Bulmahn
Overall (1989): #29,700 of 140,708Top 25%
2
Patents 1989