Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830647 | Method of manufacturing glass yarns | — | 1989-05-16 |
| 4825158 | Method of detecting conductive material contained in glass fiber by detecting changes in amplitude and frequency of an oscillator and detecting apparatus therefor | Mitsuo Yabuki, Kazuyuki Iwama, Toshihiko Yokoi | 1989-04-25 |