Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10969081 | Multi-sided luminous lighting member and three-dimensional lighting device using same | Ho Jun Jo, Woo Seok Choi | 2021-04-06 |
| 10823903 | Lighting member using light-guiding film | Ho Jun Jo, Woo Seok Choi | 2020-11-03 |
| 6293898 | Holographic memory | — | 2001-09-25 |
| 6166835 | Holographic memory | — | 2000-12-26 |
| 6043911 | Optical source module with two wavelengths and optical pickup apparatus using the same | — | 2000-03-28 |
| 6038204 | Optical source module for generating beams with different wavelengths | Jong-Uk Bu | 2000-03-14 |
| 6025953 | Annular shutter mirror | Jong-Uk Bu, Sung Woo Noh | 2000-02-15 |
| 5909293 | Hologram unit of optical pickup and method of attaching hologram plate using the same | — | 1999-06-01 |
| 5768031 | Objective lens | — | 1998-06-16 |
| 5644563 | Optical pickup system | — | 1997-07-01 |
| 5638352 | Optical pickup device | — | 1997-06-10 |
| 5594712 | Optical pickup system with five longitudinal splitted detection areas to prevent information reproducing error by wavelength variations | — | 1997-01-14 |
| 5568457 | Optical pickup system for reading or writing information on disk using hologram device and wollaston prism | Sung Woo Noh | 1996-10-22 |
| 5553050 | Optical pickup system | — | 1996-09-03 |
| 5504724 | Optical pick-up system with servo using reflection plate having aperture | — | 1996-04-02 |
| 5493425 | Optical pickup apparatus having a quadrant hologram and a quadrant photo detector | — | 1996-02-20 |
| 5483509 | Optical pick-up device with error detection using P-wave | Eun Jun KIM | 1996-01-09 |
| 5426630 | Optical pickup system | — | 1995-06-20 |
| 5309261 | Optical system for laser beam scanner | — | 1994-05-03 |
| 5274478 | Displayer with holograms | — | 1993-12-28 |
| 5253087 | Holographic laser beam scanning apparatus | — | 1993-10-12 |
| 5245442 | Multi-functional laser printer | — | 1993-09-14 |
| 5189482 | Optical apparatus for fingerprint recognition system | — | 1993-02-23 |
| 5140343 | Compositive functional laser printer | — | 1992-08-18 |
| 5109427 | Fingerprint recognition device using a hologram | — | 1992-04-28 |