Hirotsugu Matsuyama

NE Nec: 3 patents #4,195 of 14,502Top 30%

NI Nec Infrontia: 1 patents #93 of 197Top 50%

Overall (All Time): #1,266,916 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
6806684	Battery pack	—	2004-10-19
6384570	Battery pack and charge circuit therefor	—	2002-05-07
6191505	On/off control device for power source unit	—	2001-02-20
5969512	Output voltage variable power circuit	—	1999-10-19