Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851908 | Field number doubling circuit for a television signal | Frits A. Steenhof | 1989-07-25 |
| 4816907 | Television synchronizing signal pattern correction circuit | — | 1989-03-28 |
PW
Petrus W. G. Welles
Overall (1989): #18,372 of 140,708Top 15%
2
Patents 1989