Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8607557 | Hydraulic control system for excavator | Yang-Koo Lee | 2013-12-17 |
| 8572957 | Hydraulic system for construction equipment | Yang-Koo Lee | 2013-11-05 |
| 8196555 | Engine room for construction equipment | Gyeng Soo Cho, Wook Sung Yuk | 2012-06-12 |
| 7530225 | Apparatus for increasing operation speed of boom on excavators | — | 2009-05-12 |
| 7478671 | Heating apparatus for cabin of construction equipment | Chan Ju Na, Kyu Cheon Jeong | 2009-01-20 |
| 7478531 | Hydraulic circuit for heavy construction equipment | Yang-Koo Lee | 2009-01-20 |
| 7461625 | Lubricant recovering apparatus for heavy construction equipment | Chan Joo Na | 2008-12-09 |
| 4995711 | Slide table | Kuninori Imai, Takeji Shiokawa, Shigeo Kato, Isao Ishikawa, Kan Otake | 1991-02-26 |
| 4691788 | Lateral hole boring method and apparatus | Shoji Yoshida, Yasuhiko Haru, Etsuji Kosaka, Mikio Aoyama, Takeo Iida | 1987-09-08 |
| 4614475 | Hydraulic circuit system for civil engineering and architectural machinery | Seiji Tamura, Toichi Hirata | 1986-09-30 |