Patents in USA

[6] K. Umetani, “Resonant current limiting device,” US Patent Application No. 2016/0056711, Feb. 25, 2016.
[5] F. Iwamoto, K. Umetani, “Power converter device”, US Patent 9 496 790, Nov. 15, 2016.
[4] K. Umetani, “Power converter”, US Patent 9 413 230, Aug. 9, 2016.
[3] F. Iwamoto, K. Umetani, “Power converter with switched current supply control element”, US Patent 9 300 208, Mar. 29, 2016.
[2] K. Yagyu, K. Umetani, “Circuit detection circuit and semiconductor integrated circuit device”, US Patent 9 531 186, Dec. 27, 2016.
[1] K. Umetani, “Filter component,” US Patent Application No. 2014/0306788, Oct. 16, 2014.