Inventor
KAWAMOTO KAZUMI
JP30 patents
⚠️ This page may combine multiple inventors who share the name “KAWAMOTO KAZUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
17 patentsUS6597712B2Jul 22, 2003
Laser diode module
HITACHI LTD20 citations92
US5854870ADec 29, 1998
Short-wavelength laser light source
HITACHI LTD37 citations92
US5274727ADec 28, 1993
Second harmonic generator and method of fabrication thereof
HITACHI LTD25 citations92
US5191624AMar 2, 1993
Optical information storing apparatus and method for production of optical deflector
HITACHI LTD22 citations92
US5125740AJun 30, 1992
Method and apparatus for measuring optical constants of a thin film as well as method and apparatus for fabricating a thin film utilizing same
HITACHI LTD54 citations92
US7215886B2May 8, 2007
Optical communication module
HITACHI LTD23 citations90
US6661503B1Dec 9, 2003
Method for manufacturing optic transmission modules and system for inspecting bit error rate characters
HITACHI LTD26 citations89
US6937799B2Aug 30, 2005
Optical transmission module and optical communication system using the same
HITACHI LTD16 citations84
US6813419B2Nov 2, 2004
Optical transmission module and optical communication system using the same
HITACHI LTD17 citations84
US6289157B1Sep 11, 2001
Optical wave-guide, light-beam spot converter and optical transmission module
HITACHI LTD7 citations73
US5195070AMar 16, 1993
Optical information processing apparatus and optical pickup therefor
HITACHI LTD15 citations73
US4906063AMar 6, 1990
Wave guide type optical device and method of fabricating the same
HITACHI LTD13 citations71
US5187756AFeb 16, 1993
Surface acoustic waveguide device and manufacturing method
HITACHI LTD3 citations63
US6501891B2Dec 31, 2002
Optical wave-guide, light-beam spot converter and optical transmission module
HITACHI LTD5 citations62
US6635971B2Oct 21, 2003
Electronic device and optical transmission module
HITACHI LTD6 citations60
US6983000B2Jan 3, 2006
Laser diode module
HITACHI LTD0 citations51
US6822271B2Nov 23, 2004
Semiconductor photodetector and optical transmitting device
HITACHI LTD0 citations51
OPNEXT JAPAN INC
12 patentsUS6985659B2Jan 10, 2006
Optical transmission module
OPNEXT JAPAN INC33 citations92
US7177549B2Feb 13, 2007
High-frequency transmission line and an optical module incorporating the same line
OPNEXT JAPAN INC16 citations84
US6937406B2Aug 30, 2005
Optical module and method for manufacturing optical module
OPNEXT JAPAN INC14 citations83
US6813102B2Nov 2, 2004
Optical module with a monitor photo diode
OPNEXT JAPAN INC12 citations74
US7412120B2Aug 12, 2008
Optical module and optical transmission apparatus
OPNEXT JAPAN INC5 citations62
US7037000B2May 2, 2006
Optical transmission module
OPNEXT JAPAN INC4 citations62
US7027674B2Apr 11, 2006
Optical module and optical transmission apparatus
OPNEXT JAPAN INC4 citations62
US6856442B2Feb 15, 2005
Transmission line, optical module using the same and manufacturing method of optical module
OPNEXT JAPAN INC2 citations62
US6912363B2Jun 28, 2005
Optical module which permits stable laser output
OPNEXT JAPAN INC4 citations61
US6805496B2Oct 19, 2004
Optical communication module, manufacturing method thereof and wavelength selective filter
OPNEXT JAPAN INC5 citations59
US6864511B2Mar 8, 2005
Optical transmission module and the production method of the same
OPNEXT JAPAN INC0 citations51
US7044652B2May 16, 2006
Optical transmission module
OPNEXT JAPAN INC1 citations50