Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827524 | Magnetic attachment apparatus for ear-level microphone | — | 1989-05-02 |
| 4827525 | Attachment device for a probe microphone | David A. Hotvet, Ernest L. Woodfill | 1989-05-02 |
RR
Rolf C. Rising
Overall (1989): #16,856 of 140,708Top 15%
2
Patents 1989