US D597,942 S
Step-up transformer
Yosuke Koizumi, Machida (Japan)
Assigned to Kabushiki Kaisha Audio-Technica, Tokyo (Japan)
Filed on Dec. 31, 2008, as Appl. No. 29/330,228.
Claims priority of application No. 2008-025901 (JP), filed on Oct. 08, 2008.
Term of patent 14 Years
LOC (9) Cl. 13 - 02
U.S. Cl. D13—110
OG exemplary drawing
 
The ornamental design for a step-up transformer, as shown.