Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6097689 | Optical pickup system incorporated therein a polarizing film and a pair of 1/4 wavelength plates | — | 2000-08-01 |
| 6021105 | Knife edge method for use in an optical pickup system | — | 2000-02-01 |
| 5995473 | Optical pickup system capable of selectively reading a multiple number of optical disks | — | 1999-11-30 |
| 5953294 | Optical pickup apparatus | — | 1999-09-14 |
| 5939710 | Optical pickup system incorporating therein a beam splitter having a phase layer | — | 1999-08-17 |
| 5940360 | Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes | — | 1999-08-17 |
| 5917800 | Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes | — | 1999-06-29 |
| 5905254 | Compact sized optical pickup system | — | 1999-05-18 |
| 5901132 | Pickup head having two laser light sources for separately reading an optical disk with two recording layers | — | 1999-05-04 |
| 5883874 | Optical pickup system for selectively reading a multiple number of optical disks | — | 1999-03-16 |
| 5809000 | Optical pickup system for reading optical disks of different thicknesses | — | 1998-09-15 |
| 5787058 | Optical pickup apparatus utilizing a polygonal prism | — | 1998-07-28 |
| 5787066 | Both-sided optical disc player capable of transferring a both-sided disc up and down about an optical pickup | — | 1998-07-28 |
| 5777971 | Optical head with a micro fresnel lens integrated on a beam splitter | — | 1998-07-07 |
| 5768244 | Optical pickup system having an integrated twin focusing beam splitter | — | 1998-06-16 |
| 5764621 | Optical disc with a plurality of recording layers | — | 1998-06-09 |
| 5708641 | Multiple focus optical pickup system | Ki Tae Kim | 1998-01-13 |
| 5708643 | Multiple focus optical pickup system for alternatively reading a multiple number of optical disks | Ki Tae Kim | 1998-01-13 |
| 5671206 | Optical pickup device | — | 1997-09-23 |
| 5646929 | Optical pickup device | — | 1997-07-08 |
| 5636190 | Optical pickup system for use with an optical disk having multiple reflection hologram film | — | 1997-06-03 |