To be more accurate, they own Kukje, which is the parent company behind the Branson brand.
A little more info: (the Cultural Services division seems to be what we would consider a publishing company)
Divisions
Machinery Division - tractors, combine harvesters
Metal Division - silverware
Cultural Services Division
Cigarette Filter Division
History timeline
1951 Tong Yang Moolsan Co., Ltd. founded
1960 Bokun Enterprise Co. founded.
1962 Tong Yang Moolsan Co. and Bokun Enterprise Co. merged; Firm name changed to Tong Yang Moolsan Co., Ltd.
1964 Took over Korea Convenience Ind., Co., Ltd. and commenced manufacture export of stainless steel flatware and castings.
1968 Merged Korea Light Metal Co., Ltd. and commenced Agricultural Machinery production.
1973 Anyang Farm Machinery Factory established. Company shares opened to the public
1977 Light Metal Mill Factory moved to Changwon Industrial Complex from Seoul
1978 Designated as General Agricultural Machinery Manufacturer by the Government. Anyang Farm Machinery Factory moved to Changwon Idustrial Complex
1985 Agricultural Machinery Factory designated as First Grade Quality Manufacturer from the Government
1991 Head Office moved to Byucksan 125 Building, Tongja-Dong, Yonsan-Ku, Seoul. A joint corporation established in Indonesia for manufacturing Stainless Steel Flatware
1992 Established TYM's R&D Institute and Agricultural Machinery Training Institute
1993 Entered to Environment Business Division
1994 Associated corporation established in China for manufacturing Stainless steel Flatware
1996 Take over whole shares of other shareholders of PT.MITRA Tong Yang MoolSan
1997 Acquisition of ChangShin Co., Ltd and change its name into the second ChangWon Plant of Tong Yang MoolSan
1999 Established TongYang Agricultural Machinery(Suzhou) Co., LTD.
1999 alliance with Mahindra Tractors for Mahindra to sell TYM tractors in the USA under 'Mahindra' brand
2001 Established JiangSu TongYang Rice Transplanter Co., LTD.
2010 Opened assembly plant in Rwanda
2011 Began building some tractors to be sold as Lamborghini Green Pro
2016 Selected by Korean courts to purchase Kukje out of bankruptcy
2017 Began building RK tractors for Rural King to be sold in USA
2017 Began building Hortus and Utilis models for Zetor
2018 Transfer/licensing of designs to Swaraj in India, (part of Mahindra), for Swaraj to build tractors in India for sale in India and Africa
Donvita - joint venture in China, Jiangsu Dongyin Machinery Co (Jiangsu Donvita Machinery) to build tractors
Keroty - joint venture? in China, Hebei Keroty Agricultural Machinery Co., LTD. (Luoyang Yi Nong Tractor Manufacturing Co) to build tractors