| 10049559 |
Power saving safety helmet capable of wireless communication, and wireless transmission and reception method therefor |
Jae Won Lee, Young-Uk Son, Ji-man Kim, Jae Soon KANG |
2018-08-14 |
| 9990847 |
Traffic accident occurrence notification system using LED display lamps |
Duk-Yong Kim, Seok Sung, Tai-Woo Lee, Jong Hun Lee, Min Soo Kim +1 more |
2018-06-05 |
| 6952586 |
Frequency allocation system for use in a wireless communication system and method for the implementation thereof |
Duk-Yong Kim |
2005-10-04 |
| 6661374 |
Base transceiver station having multibeam controllable antenna system |
Duk-Yong Kim, Young-Chan Moon, Yong-Sup Kil |
2003-12-09 |
| 6504450 |
Signal process apparatus for phase-shifting N number of signals inputted thereto |
Duk-Yong Kim, Gyu-Sang Hwang, In-Young Lee, Sang-Wook Bang, Chang-Yun Seo +4 more |
2003-01-07 |