Inventor
KATAYAMA MASARU
JP15 patents
⚠️ This page may combine multiple inventors who share the name “KATAYAMA MASARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
9 patentsUS7630649B2Dec 8, 2009
Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method
NIPPON TELEGRAPH & TELEPHONE13 citations92
US7313094B2Dec 25, 2007
Node, an optical/electrical path integrated network using the node, and a program which controls the node
NIPPON TELEGRAPH & TELEPHONE16 citations83
US10951344B2Mar 16, 2021
Optical transmitter, optical receiver, and optical transmission system
NIPPON TELEGRAPH & TELEPHONE10 citations79
US7720390B2May 18, 2010
Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method
NIPPON TELEGRAPH & TELEPHONE6 citations73
US9883262B2Jan 30, 2018
Optical network system, optical switch node, master node, and node
NIPPON TELEGRAPH & TELEPHONE3 citations67
US11206086B2Dec 21, 2021
Optical transceiver
NIPPON TELEGRAPH & TELEPHONE1 citations59
US12388676B2Aug 12, 2025
Data transfer device, data processing device and data processing method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11251868B2Feb 15, 2022
Dispersion compensation system and dispersion compensation method
NIPPON TELEGRAPH & TELEPHONE0 citations49
US7894368B2Feb 22, 2011
OVPN system, OVPN terminating device, collective controlling device, and optical communication network
NIPPON TELEGRAPH & TELEPHONE0 citations41
OKI EIJI
2 patentsUS8909042B2Dec 9, 2014
Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method
OKI EIJI6 citations83
US8081881B2Dec 20, 2011
Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method
OKI EIJI5 citations73