Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5042924 | Optical phase plate and production process thereof | Shuji Terasaki, Mitsuru Ohta, Yuji Kojima, Akira Tanaka | 1991-08-27 |
| 4391763 | Process for the manufacture of halogen-containing resin particles of larger bulk density comprising mixing particles of the resin with inorganic salts, treated in a mixture in a gaseous phase and separating the inorganic salt from the product | Kunihiko Ueno, Masazi Hukuda, Kazuyuki Nakayama | 1983-07-05 |