US 6,983,175 B2
Mobile station
Yong Soon Kwon, Chonghan-yeonlib 1-203, 422-1, Ssangmoon-dong, Dobong-ku, Seoul (Korea, Republic of)
Appl. No. 10/258,999
PCT Filed Apr. 24, 2001, PCT No. PCT/KR01/00683
§ 371(c)(1), (2), (4) Date Oct. 31, 2002,
PCT Pub. No. WO01/84728, PCT Pub. Date Nov. 08, 2001.
Claims priority of application No. 2000-12457 (KR), filed on May 01, 2000; and application No. 2000-49945 (KR), filed on Aug. 26, 2000.
Prior Publication US 2004/0203513 A1, Oct. 14, 2004
Int. Cl. H04B 1/38 (2006.01)
U.S. Cl. 455—575.1 22 Claims
OG exemplary drawing
 
1. A mobile station comprising:
a body having a plurality of input keys on an upper surface;
a first and a second auxiliary keyboards hinge-jointed respectively to both confronting parts of a lower surface of the body so as to rotate to move horizontally wherein entire parts of the first and second auxiliary keyboards are inserted into the body so as to be folded or the rest parts of the first and second auxiliary keyboards except the hinge-jointed parts are drawn out from the body so as to be unfolded; and
a plurality of auxiliary input keys on upper surfaces of the first and second auxiliary keyboards so as to input characters, numbers with the input keys of the body when the first and second auxiliary keyboards are unfolded.