Inventor
KOKUBO MASARU
JP51 patents
⚠️ This page may combine multiple inventors who share the name “KOKUBO MASARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
28 patentsUS6377511B1Apr 23, 2002
Semiconductor integrated circuit device
HITACHI LTD28 citations96
US6300807B1Oct 9, 2001
Timing-control circuit device and clock distribution system
HITACHI LTD70 citations96
US5446767AAug 29, 1995
Frequency synthesizer
HITACHI LTD78 citations94
US5018134AMay 21, 1991
Method for cancelling echo in a transmitter and an apparatus therefor
HITACHI LTD53 citations94
US6489824B2Dec 3, 2002
Timing-control circuit device and clock distribution system
HITACHI LTD28 citations93
US5327459AJul 5, 1994
Semiconductor integrated circuit containing an automatic equalizer including a circuit for periodically updating a plurality of tap coefficients at varying frequencies
HITACHI LTD22 citations93
US7339489B2Mar 4, 2008
Sensor with wireless communication function
HITACHI LTD31 citations92
US6594197B2Jul 15, 2003
Semiconductor integrated circuit device
HITACHI LTD13 citations92
US6463008B2Oct 8, 2002
Semiconductor integrated circuit device
HITACHI LTD19 citations92
US6215364B1Apr 10, 2001
Variable frequency oscillator, and phase locked loop and clock synchronizer using thereof
HITACHI LTD28 citations92
US6163585ADec 19, 2000
Phase-locked loop circuit and radio communication apparatus using the same
HITACHI LTD30 citations92
US5574455ANov 12, 1996
Digital to analog converter and frequency synthesizer using the converter
HITACHI LTD39 citations92
US5331583AJul 19, 1994
Running-average/decimation filter for an oversampling A/D converter
HITACHI LTD25 citations92
US4796296AJan 3, 1989
PCM coder and decoder having function of two-wire/four-wire conversion
HITACHI LTD26 citations92
US4672361AJun 9, 1987
Linear interpolative analog-to-digital converter
HITACHI LTD32 citations92
US6515519B1Feb 4, 2003
Semiconductor integrated circuit device
HITACHI LTD36 citations91
US5305379AApr 19, 1994
Semiconductor integrated device
HITACHI LTD34 citations89
US4896318AJan 23, 1990
Method for cancelling echo in a transmitter and an apparatus therefor
HITACHI LTD21 citations80
US5966407AOct 12, 1999
Bus driving system and integrated circuit device using the same
HITACHI LTD12 citations74
US6535070B2Mar 18, 2003
Variable frequency oscillator, and phase locked loop and clock synchronizer using thereof
HITACHI LTD9 citations73
US4652858AMar 24, 1987
Interpolative D/A converter
HITACHI LTD15 citations73
US5311503AMay 10, 1994
Terminal apparatus for full-duplex data transmission having an echo canceller
HITACHI LTD17 citations72
US5097488AMar 17, 1992
Transmission apparatus and method
HITACHI LTD15 citations70
US7808397B2Oct 5, 2010
Sensor with wireless communication function
HITACHI LTD3 citations63
US6639933B2Oct 28, 2003
Phase-locked loop circuit and radio communication apparatus using the same
HITACHI LTD2 citations63
US6324219B2Nov 27, 2001
Phase-locked loop circuit and radio communication apparatus using the same
HITACHI LTD3 citations63
US12333409B2Jun 17, 2025
Information processing device and learning recognition system
HITACHI LTD0 citations52
US10690696B2Jun 23, 2020
Acceleration sensor
HITACHI LTD0 citations51
RENESAS TECH CORP
14 patentsUS7072242B2Jul 4, 2006
Semiconductor integrated circuit device
RENESAS TECH CORP25 citations96
US6870411B2Mar 22, 2005
Phase synchronizing circuit
RENESAS TECH CORP67 citations96
US6819626B2Nov 16, 2004
Semiconductor integrated circuit device
RENESAS TECH CORP21 citations92
US7737792B2Jun 15, 2010
Phase Locked loop circuit and semiconductor integrated circuit device using the same
RENESAS TECH CORP9 citations84
US7522896B2Apr 21, 2009
Filter control method, signal processing circuit and integrated circuit for wireless receiver
RENESAS TECH CORP12 citations84
US7664161B2Feb 16, 2010
Pulse generator and the transmitter with a pulse generator
RENESAS TECH CORP11 citations83
US7138838B2Nov 21, 2006
Phase locked loop
RENESAS TECH CORP15 citations83
US7477676B2Jan 13, 2009
Spread spectrum clock generator and integrated circuit device using the spread spectrum clock generators
RENESAS TECH CORP12 citations82
US7602665B2Oct 13, 2009
Semiconductor integrated circuit device
RENESAS TECH CORP4 citations74
US7504894B2Mar 17, 2009
Phase locked loop circuit and semiconductor integrated circuit device using the same
RENESAS TECH CORP7 citations74
US7411805B2Aug 12, 2008
Semiconductor integrated circuit device
RENESAS TECH CORP4 citations74
US7031675B2Apr 18, 2006
FM transmitter
RENESAS TECH CORP7 citations74
US6879188B2Apr 12, 2005
Semiconductor integrated circuit device
RENESAS TECH CORP11 citations72
US7446614B2Nov 4, 2008
Logical level converter and phase locked loop using the same
RENESAS TECH CORP3 citations63
HITACHI METALS LTD
2 patentsRENESAS ELECTRONICS CORP
1 patentRENASAS TECHNOLOGY CORP
1 patentTTP COMM LTD
1 patentTHE TECHNOLOGY PARTNERSHIP PLC
1 patentHITACHI ASTEMO LTD
1 patentOKUDA YUICHI
1 patentShowing the top 50 of 51 patents by PatentIndex Score.