Inventor

Yohei Sakamaki

Inventor

Atsugi, JP

Overview

13→

Patents

2009–2015

Patent span

Physics

Primary field (CPC G)

Patents· 13 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G02Bprimary

G02BOptical elements, systems or apparatus59%

H04BTransmission24%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein12%

H04JMultiplex communication6%

PatentTitleYear

8,971,677'Optical 90-degree hybrid circuit'2015 8,737,779'Optical wavelength multi/demultiplexer'2014 8,649,640'Optical 90-degree hybrid circuit'2014 8,588,560'Optical 90-degree hybrid circuit'2013 8,554,040'Planar lightwave circuit, design method for wave propagation circuit, and computer program'2013 8,538,222'Planar lightwave circuit, design method for wave propagation circuit, and computer program'2013 8,483,525'Optical wavelength multiplexing/demultiplexing circuit, optical module using optical wavelength multiplexing/demultiplexing circuit, and communication system'2013 8,467,635'Optical modulator'2013 8,463,097'Planar lightwave circuit, design method for wave propagation circuit, and computer program'2013 8,150,219'Waveguide-type optical interferometer'2012 7,899,279'Optical delay line interferometer'2011 7,856,163'Planar lightwave circuit, design method for wave propagation circuit, and computer program'2010 7,580,597'Optical functional circuit'2009

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2009–2015Patents assigned to NIPPON TELEGRAPH & TELEPHONE (13)· patent assignee history

2009–2015Based in Atsugi, JP· patent location history

2012–2015Patents assigned to SAKAMAKI YOHEI (10)· patent assignee history

2012–2015Patents assigned to HASHIMOTO TOSHIKAZU (9)· patent assignee history

2012–2015Patents assigned to TAKAHASHI HIROSHI (9)· patent assignee history

2013–2014Patents assigned to KITOH TSUTOMU (5)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NIPPON TELEGRAPH & TELEPHONE	13	2009–2015
SAKAMAKI YOHEIself	10	2012–2015
HASHIMOTO TOSHIKAZU	9	2012–2015
TAKAHASHI HIROSHI	9	2012–2015
KITOH TSUTOMU	5	2013–2014

Locations

Location	Patents	Span
Atsugi, JP	13	2009–2015