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Inventor

Toshifumi Hasama

Inventor
Tsukuba, JP

Overview

3→
Patents
2009–2013
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus50%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein50%
PatentTitleYear
8,503,836'Wavelength domain optical switch'20138,229,258'Optical waveguide-type wavelength domain switch'20127,567,736'Waveguide type wavelength domain optical switch'2009

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2009–2013Patents assigned to HITACHI CABLE (3)· patent assignee history
2009–2013Patents assigned to NAT INST OF ADVANCED IND SCIEN (3)· patent assignee history
2009–2013Based in Tsukuba, JP· patent location history
2012–2013Patents assigned to HASAMA TOSHIFUMI (2)· patent assignee history
2012–2013Patents assigned to ISHIKAWA HIROSHI (2)· patent assignee history
2012–2013Patents assigned to KAWASHIMA HITOSHI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI CABLE32009–2013
NAT INST OF ADVANCED IND SCIEN32009–2013
HASAMA TOSHIFUMIself22012–2013
ISHIKAWA HIROSHI22012–2013
KAWASHIMA HITOSHI22012–2013
Locations
LocationPatentsSpan
Tsukuba, JP32009–2013