Frishauf, Holtz, Goodman & Woodward
Step-up transformer
 A small and thin step-up transformer suitable for use in an inverter or the like includes: a bobbin formed of an insulating material having a cylindrical winding shaft; a primary winding wound on said winding shaft; and a secondary winding wound in alignment in multi-layers from the inner side to the outer side thereof; and wherein the primary winding and the secondary winding are separated from each other at a portion of the bobbin to be arranged side by side in the central axial direction of the winding shaft and are electromagnetically coupled to each other. 
Toko, Inc.
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additional inventional inventional inventional
Shigetoshi Minoru Akira Tomomi
Watanabe Nakano Shinmei Hiura