Inventor
Tsutomu Kitoh
Inventor
Atsugi, JP
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus75%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%
H04JMultiplex communication8%
H04BTransmission4%
H04QSelecting4%
PatentTitleYear
9,306,670'Optical coupling/splitting device, two-way optical propagation device, and optical-transmit-receive system'20169,116,305'Arrayed waveguide grating, optical module provided with said arrayed waveguide grating, and optical communications system'20158,787,710'Wideband interferometer type polarization light beam combiner and splitter'20148,737,779'Optical wavelength multi/demultiplexer'20148,554,040'Planar lightwave circuit, design method for wave propagation circuit, and computer program'20138,538,222'Planar lightwave circuit, design method for wave propagation circuit, and computer program'20138,483,525'Optical wavelength multiplexing/demultiplexing circuit, optical module using optical wavelength multiplexing/demultiplexing circuit, and communication system'20138,463,097'Planar lightwave circuit, design method for wave propagation circuit, and computer program'20138,369,666'Optical wavelength multiplexing/ de-multiplexing circuit'20137,856,163'Planar lightwave circuit, design method for wave propagation circuit, and computer program'20107,590,312'Interferometer optical switch and variable optical attenuator'20097,580,597'Optical functional circuit'20097,400,800'Arrayed waveguide grating type optical multiplexer/demultiplexer circuit'20087,397,977'Wave transmission medium and waveguide circuit'20087,085,438'Optical multi/demultiplexing circuit equipped with phase generating device'20066,937,797'Planar lightwave circuit and optical circuit'20056,735,358'Optical multiplexer and optical demultiplexer'20046,606,433'Optical multi/demultiplexer'2003Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2003–2016Patents assigned to NIPPON TELEGRAPH & TELEPHONE (18)· patent assignee history
2003–2005Based in Mito, JP· patent location history
2006–2016Based in Atsugi, JP· patent location history
2008Based in Kanagawa, JP· patent location history
2013–2014Patents assigned to KITOH TSUTOMU (7)· patent assignee history
2013–2014Patents assigned to HASHIMOTO TOSHIKAZU (5)· patent assignee history
2013–2014Patents assigned to SAKAMAKI YOHEI (5)· patent assignee history
2013–2014Patents assigned to TAKAHASHI HIROSHI (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 18 | 2003–2016 |
| KITOH TSUTOMUself | 7 | 2013–2014 |
| HASHIMOTO TOSHIKAZU | 5 | 2013–2014 |
| SAKAMAKI YOHEI | 5 | 2013–2014 |
| TAKAHASHI HIROSHI | 5 | 2013–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Atsugi, JP | 14 | 2006–2016 |
| Mito, JP | 3 | 2003–2005 |
| Kanagawa, JP | 1 | 2008 |