Inventor

Koji Nakazato

Inventor

Yokohama, JP

Overview

15→

Patents

1993–2013

Patent span

Electricity

Primary field (CPC H)

Patents· 15 as inventor

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

H01Sprimary

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light30%

G02BOptical elements, systems or apparatus20%

H04BTransmission20%

C03CChemical composition of glasses, glazes or vitreous enamels10%

B23KSoldering or unsoldering7%

G01NInvestigating or analysing materials by determining their chemical or physical properties3%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein3%

H04WWireless communication networks3%

H05BElectric heating3%

PatentTitleYear

8,546,722'Laser processing apparatus and processing method employed therein'2013 8,303,738'Metal heating apparatus, metal heating method, and light source apparatus'2012 6,599,039'Optical transmission monitoring apparatus, optical transmission monitoring method, optical amplification system, method of controlling optical amplification system, and optical transmission system'2003 6,359,727'Optical amplifier for wavelength-multiplexing transmission'2002 6,282,361'Multi-channel variable optical attenuator'2001 5,721,635'Optical fiber amplifier and optical amplifier repeater'1998 5,640,269'Optical fiber amplifier and optical amplifier repeater'1997 5,572,357'Optical system for amplifying signal light'1996 5,532,870'Optical fiber amplifier and optical amplifier repeater'1996 5,446,820'Mode field diameter conversion optical fiber'1995 5,381,503'Mode field diameter conversion fiber'1995 5,377,294'Optical functioning glass and apparatus using the same'1994 5,337,401'Optical functioning glass and method of manufacturing same, optical fiber, waveguide device, and laser device'1994 5,253,322'Optical functioning glass and fiber amplifier'1993 5,244,846'Optical functioning glass and apparatus using the same'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2013Patents assigned to SUMITOMO ELECTRIC INDUSTRIES (15)· patent assignee history

1993–1995Patents assigned to NIPPON TELEGRAPH & TELEPHONE (4)· patent assignee history

1993–2013Based in Yokohama, JP· patent location history

2001–2003Based in Kanagawa, JP· patent location history

2012–2013Patents assigned to INOUE AKIRA (2)· patent assignee history

2012–2013Patents assigned to KOHDA HIROSHI (2)· patent assignee history

2012–2013Patents assigned to NAKAZATO KOJI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SUMITOMO ELECTRIC INDUSTRIES	15	1993–2013
NIPPON TELEGRAPH & TELEPHONE	4	1993–1995
INOUE AKIRA	2	2012–2013
KOHDA HIROSHI	2	2012–2013
NAKAZATO KOJIself	2	2012–2013

Locations

Location	Patents	Span
Yokohama, JP	13	1993–2013
Kanagawa, JP	2	2001–2003