Inventor
HIRAIZUMI MAKI
JP10 patents
⚠️ This page may combine multiple inventors who share the name “HIRAIZUMI MAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
6 patentsUS7123404B1Oct 17, 2006
Optical amplifier and optical amplification method
FUJITSU LTD23 citations92
US7554721B2Jun 30, 2009
Raman amplifier and Raman amplifier adjustment method
FUJITSU LTD13 citations91
US5939920AAug 17, 1999
Method and apparatus which adds distortion to a signal to compensate for distortion added at a later stage by a nonlinear element
FUJITSU LTD21 citations91
US5793411AAug 11, 1998
Video-on-demand system
FUJITSU LTD11 citations72
US5550977AAug 27, 1996
Multi-media mailing method and apparatus
FUJITSU LTD4 citations61
US7058298B2Jun 6, 2006
Optical transmission device and optical transmission system
FUJITSU LTD4 citations59
HIRAIZUMI MAKI
4 patentsUS8588609B2Nov 19, 2013
Wavelength division multiplexing transmission system and apparatus and optical signal noise ratio calculation method
HIRAIZUMI MAKI8 citations82
US8564876B2Oct 22, 2013
Raman amplifier and raman amplifier adjustment method
HIRAIZUMI MAKI8 citations82
US8339698B2Dec 25, 2012
Raman amplifier and raman amplifier adjustment method
HIRAIZUMI MAKI5 citations71
US8213078B2Jul 3, 2012
Raman amplifier and raman amplifier adjustment method
HIRAIZUMI MAKI5 citations71