Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810894 | Method and apparatus for measuring film thickness using a second sheet of known thickness | Toshishige Nagao, Masayuki Ariki | 1989-03-07 |
YI
Yoshiaki Ida
Overall (1989): #41,188 of 140,708Top 30%
1
Patents 1989