Inventor
OHBU ISAO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “OHBU ISAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RENESAS TECH CORP
10 patentsUS6816017B2Nov 9, 2004
Power amplifier module
RENESAS TECH CORP29 citations92
US7256434B2Aug 14, 2007
Heterojunction bipolar transistor and method for manufacturing the same, and power amplifier using the same
RENESAS TECH CORP11 citations84
US7368988B2May 6, 2008
High-frequency power amplifier
RENESAS TECH CORP7 citations74
US6943387B2Sep 13, 2005
Semiconductor device, manufacturing thereof and power amplifier module
RENESAS TECH CORP7 citations74
US6696711B2Feb 24, 2004
Semiconductor device and power amplifier using the same
RENESAS TECH CORP10 citations74
US7622756B2Nov 24, 2009
Semiconductor device and radio communication device
RENESAS TECH CORP7 citations73
US7045877B2May 16, 2006
Semiconductor protection device
RENESAS TECH CORP7 citations73
US7001819B2Feb 21, 2006
Semiconductor device and power amplifier using the same
RENESAS TECH CORP2 citations63
US7547929B2Jun 16, 2009
Semiconductor HBT MMIC device and semiconductor module
RENESAS TECH CORP3 citations62
US6724020B2Apr 20, 2004
Semiconductor device and power amplifier using the same
RENESAS TECH CORP0 citations52
HITACHI LTD
4 patentsUS6461927B1Oct 8, 2002
Semiconductor device and method of producing the same
HITACHI LTD37 citations92
US5144603ASep 1, 1992
Optical head incorporating refractive index distribution changeable lens
HITACHI LTD21 citations80
US7067857B2Jun 27, 2006
Semiconductor device having led out conductor layers, manufacturing method of the same, and semiconductor module
HITACHI LTD9 citations73
US6576937B2Jun 10, 2003
Semiconductor device and power amplifier using the same
HITACHI LTD7 citations73