Inventor

OBARA HITOSHI

JP6 patents

⚠️ This page may combine multiple inventors who share the name “OBARA HITOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON TELEGRAPH & TELEPHONE

4 patents

US5617234AApr 1, 1997

Multiwavelength simultaneous monitoring circuit employing arrayed-waveguide grating

NIPPON TELEGRAPH & TELEPHONE234 citations97

US6157025ADec 5, 2000

Disk shaped tunable optical filter

NIPPON TELEGRAPH & TELEPHONE76 citations95

US7164861B2Jan 16, 2007

Node apparatus, optical wavelength division multiplexing network, and system switching method

NIPPON TELEGRAPH & TELEPHONE29 citations92

US7433594B2Oct 7, 2008

Node apparatus, optical wavelength division multiplexing network, and system switching method

NIPPON TELEGRAPH & TELEPHONE16 citations83

FUJITSU LTD

1 patent

US5696623ADec 9, 1997

UV exposure with elongated service lifetime

FUJITSU LTD108 citations93

OBARA HITOSHI

1 patent

US8059640B2Nov 15, 2011

Multistage switch control circuit

OBARA HITOSHI4 citations55