US D586,744 S
Frequency converter
Jukka Timo Johannes Jaskari, Vaasa (Finland)
Assigned to Vacon Oyj, Vaasa (Finland)
Filed on Apr. 28, 2008, as Appl. No. 29/317,361.
Term of patent 14 Years
LOC (9) Cl. 13 - 02
U.S. Cl. D13—110
OG exemplary drawing
 
The ornamental design for a frequency converter, as shown.