| Ko Chien Electric Co., Ltd.( Taipei Hsien ) | Ko; Thomas Sai Ying( Beijing ) | Koa Oil Company, Ltd. ( Tokyo, JP ) |
| KO DA PHARMACEUTICAL CO., LTD. | Ko; Yoon-Yong( Kwangju ) | Koagas Nihon Co., Ltd. |
| Ko Fung Products Industrial Limited( Kwai Chung ) | KO9NINKLIJKE PHILLIPS ELECTRONICS N.V. | Koagas Nihon Co., Ltd.( Kagoshima-ken ) |
| Ko Fung Products Industrial Limited ( Kwai Chung, HK ) | KOA Corporation | KOAGAS NIHON CO., LTD. ( Kagoshima-shi, JP ) |
| Ko Fung Products Industrial Limited ( Kwai Chung, N.T. ) | KOA Corporation ( both of, JP ) | Koala Corporation |
| Ko Fung Products Industrial Limited ( Kwai Chung, New Territories ) | KOA Corporation( Ina ) | Koala Corporation ( Denver, CO ) |
| Ko Fung Products Industrial Limited( New Territories ) | KOA CORPORATION ( Ina-shi, JP ) | Koala Corporation ( Englewood, CO ) |
| KO Manufacturing, Inc. | KOA Corporation( Nagano ) | Koala Technology, Inc. ( Loudon, TN ) |
| KO Manufacturing, Inc. ( Springfield, MO ) | KOA Corporation ( Nagano, JP ) | Koalesce, Inc. ( Colorado Springs, CO ) |
| Ko Okumura( Tokyo ) | KOA Glass Co., Ltd.( Tokyo ) | KOASWELL CO., LTD. |
| Ko Semiconductors Co., Ltd.( Taipei ) | KOA GLASS CO., LTD. ( Tokyo, JP ) | Koatsu Gas Kogyo Co., Ltd. ( Ohsaka, JP ) |
| Ko Sung Wook( Seoul ) | Koa Kabushiki Kaisha | Koatsu Gas Kogyo Co., Ltd.( Osaka ) |
| Ko Thomas Sai Ying( Beijing ) | Koa Kabushiki Kaisha( Ina ) | Koatsu Gas Kogyo Co., Ltd. ( Osaka, JP ) |
| Ko Yuan Investment Co., Ltd.( Taipei ) | KOA Kabushiki Kaisha( Ina-shi ) | Koatsu Gas Koygo Co., Ltd. ( Osaka, JP ) |
| Ko, Frank ( Wellesley, MA ) | Koa Kabushiki Kaisha ( Tokyo, JP ) | KOB, Inc. ( Gretna, LA ) |
| Ko; Ensei ( Oiso, JP ) | Koa Oil Company Limited ( Tokyo, JP ) | Kobashi; Makoto( Nagoya ) |
| Ko; Kam | Koa Oil Company, Limited ( Tokyo, JP ) | |
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