Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851024 | Process for producing optical glass | Hiroyuki Sakai, Shigeaki Ohmi, Yoshiyuki Asahara | 1989-07-25 |
| 4844724 | Method of adjusting refractive index distribution lenses | Hiroyuki Sakai, Yoshiyuki Asahara, Shigeaki Omi, Shin Nakayama | 1989-07-04 |
| 4805997 | Gradient refractive index type anamorphic planar microlens and method of producing the same | Yoshiyuki Asahara, Shigeaki Omi, Hiroyuki Sakai, Shin Nakayama | 1989-02-21 |