Young-man Ahn
74Patents
8h-index
60Co-inventors
81Inventor score
Filing activity: May 5, 1998 → Feb 28, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6944737B2 | Memory modules and methods having a buffer clock that operates at different clock frequencies according to the operating mode | Physics | 14 | Expired |
| US6483758B1 | Integrated circuit test systems that use direct current signals and impedance elements to improve test signal transmission speed and reduce test signal distortion | Physics | 13 | Expired |
| US7266074B2 | Optical disc apparatus and method of reproducing a wobble signal | Physics | 13 | Expired |
| US6219330A | Master disk for optical disk and having first and second photoresist layers | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6828837B2 | Low power flip-flop circuit | Electricity | 10 | Expired |
| US6853614B2 | Aberration correction element and optical pickup adopting the same | Physics | 9 | Expired |
| US7180846B2 | Phase compensator and compatible optical pickup using the phase compensator | Physics | 8 | Expired |
| US6590851B1 | Optical pickup for recording/reproducing optical discs of multiple thicknesses | Physics | 8 | Expired |
| US6563780B2 | Compatible optical pickup for high-density recording/reproduction | Physics | 8 | Expired |
| US6009071A | Optical disk having information pits with projections formed therein | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7345981B2 | Optical pickup | Physics | 6 | Active |
| US6909314B2 | Flip-flop circuit | Electricity | 6 | Expired |
| US7120109B1 | Optical pickup with improved collimating lens for use with long and short wavelength laser beams | Physics | 6 | Expired |
| US7764475B2 | Electrostatic discharge circuit and method for reducing input capacitance of semiconductor chip including same | Electricity | 5 | Active |
| US7324424B2 | Compatible optical pickup having diffractive device to correct chromatism and divergent lens to increase working distance | Physics | 5 | Expired |
| US6987724B2 | Optical pickup device having chromatic aberration correction lens | Physics | 5 | Expired |
| US6400660B1 | Optical disk and apparatus for reading the same based upon the length of a mirror region | Physics | 5 | Expired |
| US7487413B2 | Memory module testing apparatus and method of testing memory modules | Physics | 4 | Active |
| US6798731B1 | Optical pickup for and method of correcting aberration due to thickness variations of optical media | Physics | 4 | Expired |
| US6580670B2 | Optical pickup using a single light spot to generate tracking error signal and reproduction signal | Physics | 4 | Expired |
| US7289417B2 | Lens correcting wavefront error caused by tilt and optical pickup using same | Physics | 4 | Expired |
| US6785209B2 | Optical pickup for improving properties of a reproduction signal | Physics | 4 | Expired |
| US9548091B2 | Memory module having address mirroring function | Physics | 3 | Active |
| US6646976B1 | Optical pickup apparatus capable of reducing cross talk by adjacent tracks and a method therefor | Physics | 3 | Expired |
| US7319635B2 | Memory system with registered memory module and control method | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.