P

Inventor

NAKAHARA KEN

JP53 patents
⚠️ This page may combine multiple inventors who share the name “NAKAHARA KEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ROHM CO LTD

35 patents
US9837521B2Dec 5, 2017

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD29 citations98
US7132691B1Nov 7, 2006

Semiconductor light-emitting device and method for manufacturing the same

ROHM CO LTD189 citations98
US6735230B1May 11, 2004

Semiconductor luminous elements and semiconductor laser

ROHM CO LTD87 citations97
US8004006B2Aug 23, 2011

Nitride semiconductor light emitting element

ROHM CO LTD30 citations93
US6569548B2May 27, 2003

Transparent conductive film of zinc oxide

ROHM CO LTD32 citations93
US7960727B2Jun 14, 2011

Zinc oxide based compound semiconductor device

ROHM CO LTD24 citations86
US10256335B2Apr 9, 2019

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD4 citations84
US7906791B2Mar 15, 2011

Semiconductor light emitting element

ROHM CO LTD11 citations84
US7582905B2Sep 1, 2009

Semiconductor light emitting device

ROHM CO LTD11 citations84
US7196348B2Mar 27, 2007

GaN system semiconductor light emitting device excellent in light emission efficiency and light extracting efficiency

ROHM CO LTD14 citations84
US8053756B2Nov 8, 2011

Nitride semiconductor light emitting element

ROHM CO LTD9 citations83
US7781791B2Aug 24, 2010

Semiconductor light emitting element

ROHM CO LTD19 citations83
US7741637B2Jun 22, 2010

ZnO-based semiconductor device

ROHM CO LTD8 citations81
US7002179B2Feb 21, 2006

ZnO system semiconductor device

ROHM CO LTD10 citations74
US9806824B2Oct 31, 2017

Wireless power supply receiver-transmitter device, wireless power supply receiver and wireless power supply transmitter

ROHM CO LTD2 citations73
US6987029B2Jan 17, 2006

ZnO based compound semiconductor light emitting device and method for manufacturing the same

ROHM CO LTD10 citations73
US11482918B2Oct 25, 2022

Gate drive circuit

ROHM CO LTD5 citations71
US11011970B2May 18, 2021

Gate drive circuit

ROHM CO LTD3 citations71
US11394288B2Jul 19, 2022

Negative voltage generation circuit and power conversion device using same

ROHM CO LTD2 citations67
US8049235B2Nov 1, 2011

Nitride semiconductor light emitting element with bragg reflection layers and anti-reflection layers to improve light extraction efficiency

ROHM CO LTD3 citations63
US7872269B2Jan 18, 2011

Gallium nitride semiconductor light emitting element

ROHM CO LTD6 citations63
US7292382B2Nov 6, 2007

Light control unit

ROHM CO LTD4 citations63
US12369346B2Jul 22, 2025

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD0 citations62
US11990455B2May 21, 2024

Semiconductor device

ROHM CO LTD1 citations62
US11777024B2Oct 3, 2023

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD0 citations62
US10991818B2Apr 27, 2021

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD0 citations62
US8975645B2Mar 10, 2015

Optical filter

ROHM CO LTD2 citations60
US6711198B1Mar 23, 2004

Light source device for laser beam printer

ROHM CO LTD4 citations60
US12446263B2Oct 14, 2025

Nitride semiconductor device

ROHM CO LTD0 citations52
US11393905B2Jul 19, 2022

Nitride semiconductor device

ROHM CO LTD0 citations52
US10686064B2Jun 16, 2020

Nitride semiconductor device and fabrication method therefor

ROHM CO LTD0 citations52
US7948003B2May 24, 2011

Transparent electrode

ROHM CO LTD0 citations52
US7417263B2Aug 26, 2008

Transparent electrode

ROHM CO LTD0 citations52
US11095217B2Aug 17, 2021

Ripple injection circuit and electronic device equipped with this circuit

ROHM CO LTD0 citations49
US11885763B2Jan 30, 2024

Gas concentration measurement system and gas concentration measurement method

ROHM CO LTD0 citations48

NAT INST OF ADVANCED IND SCIEN

6 patents

NAKAHARA KEN

6 patents

NIWA DAISUKE

1 patent

YAMAGUCHI ATSUSHI

1 patent

SAKAI MITSUHIKO

1 patent

Showing the top 50 of 53 patents by PatentIndex Score.