Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9593433 | Crystal holding mechanism of single crystal pulling device and method for producing single crystal ingot | Takuya Yotsui | 2017-03-14 |
| 5997641 | Seed-crystal holder for single-crystal pulling devices with magnetic field applied thereto | Mitsunori Kawabata, Yoshinobu Hiraishi, Mitsuo Usukubo | 1999-12-07 |
| 5885347 | Apparatus and method for lifting single crystals | Junsuke Tomioka, Hiroshi Inagaki, Toshimichi Kubota | 1999-03-23 |
| 5857840 | Vacuum pump with a centrifugal dust collector and a metal mesh dust collector mounted in parallel | Yoshinobu Hiraishi | 1999-01-12 |
| 5824153 | Apparatus with movable arms for holding a single-crystal semiconductor ingot | Yoshinobu Hiraishi, Koichi Shimomura | 1998-10-20 |