Issued Patents 2017
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9618744 | Optical device and virtual image display apparatus | — | 2017-04-11 |
| 9618766 | Optical device and display apparatus | Mitsutaka Ide, Kunihiko Yano | 2017-04-11 |
| 9568730 | Optical device including diffraction elements for diffracting light inside of a light guide, image projecting apparatus, and electronic device | Fumika Yamada, Osamu Yokoyama | 2017-02-14 |
| 9541757 | Light flux diameter-expanding element and display apparatus | Osamu Yokoyama | 2017-01-10 |