Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940440 | Weak beam scanning of cathode ray tubes | Charles H. Rehkopf, Samuel Sunwhee Chung | 1990-07-10 |
| 4832646 | Aging process for cathode ray tubes | Samuel Sunwhee Chung, Charles H. Rehkopf, Doanld L. Siefker, James R. Stowe | 1989-05-23 |