Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12234183 | Optical glass, and optical element, cemented lens, optical system, interchangeable lens for camera and optical device using same | — | 2025-02-25 |
| 11724959 | Optical glass, and optical element, cemented lens, optical system, interchangeable lens for camera and optical device using same | — | 2023-08-15 |
| 9527766 | Optical glass, optical element, optical system, and optical device | Hiroshi Yamamoto | 2016-12-27 |
| 5168008 | Glazed cement product and method for manufacturing thereof | Shigeo Yoshida, Satoshi Kitagawa, Shozo Harada, Manaba Hasegawa | 1992-12-01 |
| 4797319 | Glazed cement product and method for manufacturing thereof | Shigeo Yoshida, Satoshi Kitagawa, Shozo Harada, Manabu Hasegawa | 1989-01-10 |
| 4407769 | Method of manufacturing cement products having superior mechanical strength | Shozo Harada, Kazuo Ito, Takayuki Shirai | 1983-10-04 |