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 1968  ¤ýÇö´ë°ø¾÷»ç¼³¸³
     Established Hyundai industrial factory
 
 1983  ¤ý¼ºÈƾ˷ç¹Ì´½ ´ë¸®Á¡ °³¼³
     Established Sunghun Aluminum agency
 
 1991.2  ¤ýÁ¶ÈïÆ¯¼ö¼¦½Ã(ÁÖ)¿¡¼­ ¿µµ¿Æ¯¼ö¼¦½Ã(ÁÖ)·Î »óÈ£º¯°æ
     Changing firm name from jo hung special sash Co.,Ltd
      to Young dong special sash Co.,Ltd
 
 1992.8  ¤ýÀü¹®°Ç¼³(âȣ°ø»ç¾÷) Ãëµæ
     Obatainde special construction (Construction for windows)
 1998.7  ¤ýâȣ¿ë ¼¦½Ã ÀÇÀåµî·Ï
     Registration of designs (Sash for windows)
 
 1999.2  ¤ýÁ¶¸³½Ä â»ì ½Ç¿ë½Å¾Èµî·Ï
     Registration of pratical design (Prefabricated lattice) No.97-9795
 
 1999.7  ¤ýÁ¶¸³½Ä â»ì ½Ç¿ë½Å¾Èµî·Ï (97-14775, 96-14908)
     Registration of pratical design (Prefabricated lattice)
     No.97-14775, 96-14908
 
 1999.8  ¤ý¾Ë·ç¹Ì´½¼¦½Ã ·¦Çιæ¹ý ƯÇãµî·Ï (Á¦230528È£)
     Registration of special pemission
     (Method of aluminum sash wrapping) No.230528
 
 1999.9  ¤ý½ÃÈ­ÁöÁ¡ °øÀå ¼³Ä¡ (½ºÅÙ·¹½º °­°ü ¹× Á¦Ç°)
    -°æ±âµµ ½ÃÈï½Ã Á¤¿Õµ¿ 1382-6 (½ÃÈ­°ø´Ü 3¸¶ 406-1)
     Located a factory in shi hwa (Stainless pipes & products)
     -1382-6 shi hwa inductrial complex 3 ma 406-1
     -jung wang-dong, shihung-si, kyungki-do
 
 ¤ý±â°è ±¸Á¶¿ë ½ºÅÙÀη¹½º °­°ü¿¡ ´ëÇÑ ¢ÞÇ¥½ÃÇã°¡ ȹµæ
     (KSD3536)
     Permission of representing K.S mark
     (Stainless steel pipes for mechanical structure)