Oblon, Spivak, McClelland, Maier & Neustadt
Method of producing a deflection yoke core
 A shaped product having a shape corresponding to a flare-like deflection yoke core is formed from clay as a raw material of ferrite by a wet molding method; parting grooves are formed in the inner or outer circumferential surface of the shape product while it is green; and the thus obtained shaped product is dried and calcined, whereby a deflection yoke core is produced. 
Mitsubishi Denki Kabushiki Kaisha
B B B
B28B B28B B28B
inventional inventional inventional
Takaichi Toshihiko
Suzuki Mori