Airtech Japan, Ltd. (TSE:6291) sold an unknown stake in Suzhou Huatai Air Tech Filter Co., Ltd. in June 2011. Post transaction, Airtech Japan exited from the shareholding of Suzhou Huatai Air Tech Filter. Airtech Japan, Ltd. (TSE:6291) completed the sale of an unknown stake in Suzhou Huatai Air Tech Filter Co., Ltd. in June 2011.