OGUMA; Takefumi

Patent Applications and Registrations

Patent applications and USPTO patent grants for OGUMA; Takefumi.The latest application filed is for "optical time domain reflectometer, method of testing optical transmission line, and test system of optical transmission line".

Company Profile

1.15.22

OGUMA; Takefumi - Tokyo JP
Oguma; Takefumi - Minato-ku Tokyo JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Optical Time Domain Reflectometer, Method Of Testing Optical Transmission Line, And Test System Of Optical Transmission Line App 20210328667 - MATSUMOTO; Yuhei ; et al.	2021-10-21
Optical Time Domain Reflectometer, Test Method Of Optical Transmission Line, And Test System Of Optical Transmission Line App 20210194577 - MATSUMOTO; Yuhei ; et al.	2021-06-24
Optical transmission device Grant 10,659,165 - Matsuyama , et al.	2020-05-19
Optical device with optical filters and processing method of optical signals Grant 10,539,741 - Matsuyama , et al. Ja	2020-01-21
Optical Transmission Apparatus And Control Method Of Optical Transmission Apparatus App 20190097749 - OGUMA; Takefumi ; et al.	2019-03-28
Optical Device App 20190064437 - MATSUYAMA; Yurie ; et al.	2019-02-28
Optical Transmission Device App 20190058526 - MATSUYAMA; Yurie ; et al.	2019-02-21
Optical channel monitor Grant 8,879,908 - Oguma November 4, 2	2014-11-04
Wavelength division multiplexing transmission system, optical channel monitor and optical channel monitoring method Grant 8,837,939 - Sugahara , et al. September 16, 2	2014-09-16
Optical Transmission Device App 20130315601 - Oguma; Takefumi	2013-11-28
Optical Transmission Device App 20130315602 - Oguma; Takefumi	2013-11-28
Optical Channel Monitor App 20120321299 - OGUMA; Takefumi	2012-12-20
Collection of data from an optical channel monitor without causing a malfunction of a transmission apparatus Grant 8,238,745 - Oguma August 7, 2	2012-08-07
Method and system for power stability control in wavelength division multiplexing networks Grant 8,135,280 - Zong , et al. March 13, 2	2012-03-13
Optical Channel Monitor And Method Of Calculating Signal Light Level Of Optical Channel Monitor App 20120008941 - Oguma; Takefumi	2012-01-12
Wavelength division multiplexing filter, wavelength division multiplexing system, and wavelength division multiplexing method Grant 8,095,011 - Yano , et al. January 10, 2	2012-01-10
Wavelength Division Multiplexing Transmission System, Optical Channel Monitor And Optical Channel Monitoring Method App 20110286745 - SUGAHARA; HIROMITSU ; et al.	2011-11-24
Optical feedback control unit, optical communication system, feedback control method, and recording medium for recording program Grant 7,649,162 - Oguma , et al. January 19, 2	2010-01-19
Wavelength Division Multiplexing Filter, Wavelength Division Multiplexing System, And Wavelength Division Multiplexing Method App 20090226173 - YANO; YUTAKA ; et al.	2009-09-10
Collection Of Data From An Optical Channel Monitor Without Causing A Malfunction Of A Transmission Apparatus App 20090162054 - OGUMA; TAKEFUMI	2009-06-25
Method And System For Power Stability Control In Wavelength Division Multiplexing Networks App 20090092391 - Zong; Lei ; et al.	2009-04-09
Optical Feedback Control Unit, Optical Communication System, Feedback Control Method, And Recording Medium For Recording Program App 20080217511 - OGUMA; TAKEFUMI ; et al.	2008-09-11
Method and apparatus for adjusting loss caused by optical fiber curvature, and optical transmission system using the same Grant 7,389,032 - Oguma June 17, 2	2008-06-17
Method And Apparatus For Adjusting Loss Caused By Optical Fiber Curvature, And Optical Transmission System Using The Same App 20070189697 - OGUMA; Takefumi	2007-08-16
Optical add/drop device, optical add/drop system, and optical signal add/drop method App 20060239684 - Oguma; Takefumi	2006-10-26
Output monitor/control apparatus and optical communication system Grant 7,127,183 - Oguma October 24, 2	2006-10-24
Heating element device, heating element mounted structure, temperature control circuit, temperature control apparatus, and module Grant 6,911,627 - Oguma , et al. June 28, 2	2005-06-28
Heating element device, heating element mounted structure, temperature control circuit, temperature control apparatus, and module App 20030230566 - Oguma, Takefumi ; et al.	2003-12-18
Temperature controller and light-waveguide with the same Grant 6,601,401 - Oguma August 5, 2	2003-08-05
Laser oscillation wavelength monitoring device Grant 6,597,483 - Oguma July 22, 2	2003-07-22
Heater for heating waveguide and waveguide with heater App 20030127445 - Oguma, Takefumi ; et al.	2003-07-10
Output monitor/control apparatus and optical communication system App 20020041414 - Oguma, Takefumi	2002-04-11
Temperature controller and light-waveguide with the same App 20020035835 - Oguma, Takefumi	2002-03-28

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