Inventor
NAKAGAWA MASAHIRO
JP53 patents
⚠️ This page may combine multiple inventors who share the name “NAKAGAWA MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
13 patentsUS12204291B2Jan 21, 2025
Time transmission correction device, time transmission system, and delay measurement method
NIPPON TELEGRAPH & TELEPHONE2 citations73
US11722288B2Aug 8, 2023
Time synchronization path selection device and time synchronization path selection method
NIPPON TELEGRAPH & TELEPHONE2 citations71
US9883262B2Jan 30, 2018
Optical network system, optical switch node, master node, and node
NIPPON TELEGRAPH & TELEPHONE3 citations67
US11742976B2Aug 29, 2023
Optical branch insertion device and optical transmission system using optical branch insertion device
NIPPON TELEGRAPH & TELEPHONE1 citations59
US12191904B2Jan 7, 2025
Burst optical relaying device and burst optical relaying method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11855760B2Dec 26, 2023
Transmission device, time transmission system, and delay compensation method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11791922B2Oct 17, 2023
Transmission device, time transmission system, and delay compensation method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11750358B2Sep 5, 2023
Time transmission device and transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11638228B2Apr 25, 2023
Time comparison device and time quality monitoring method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11438857B2Sep 6, 2022
Transmission device, time transmission system, and delay measurement method
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11251868B2Feb 15, 2022
Dispersion compensation system and dispersion compensation method
NIPPON TELEGRAPH & TELEPHONE0 citations49
US11757554B2Sep 12, 2023
Optical branch insertion device and optical transmission system using optical branch insertion device
NIPPON TELEGRAPH & TELEPHONE0 citations48
US11652563B2May 16, 2023
Optical demultiplexer, optical separation device, optical transmission system, and optical transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations48
NIKON CORP
12 patentsUS5754299AMay 19, 1998
Inspection apparatus and method for optical system, exposure apparatus provided with the inspection apparatus, and alignment apparatus and optical system thereof applicable to the exposure apparatus
NIKON CORP101 citations97
US5859707AJan 12, 1999
Position detection apparatus and aligner comprising same
NIKON CORP64 citations96
US5309198AMay 3, 1994
Light exposure system
NIKON CORP93 citations96
US5783833AJul 21, 1998
Method and apparatus for alignment with a substrate, using coma imparting optics
NIKON CORP75 citations95
US5680200AOct 21, 1997
Inspection apparatus and method for optical system, exposure apparatus provided with the inspection apparatus, and alignment apparatus and optical system thereof applicable to the exposure apparatus
NIKON CORP89 citations95
US4939630AJul 3, 1990
Illumination optical apparatus
NIKON CORP115 citations95
US6668075B1Dec 23, 2003
Position detection apparatus and method
NIKON CORP42 citations92
US5684569ANov 4, 1997
Position detecting apparatus and projection exposure apparatus
NIKON CORP21 citations92
US5184196AFeb 2, 1993
Projection exposure apparatus
NIKON CORP53 citations90
US10025194B2Jul 17, 2018
Exposure apparatus, exposure method, and method for producing device
NIKON CORP1 citations61
US9513558B2Dec 6, 2016
Exposure apparatus, exposure method, and method for producing device
NIKON CORP1 citations61
US8749759B2Jun 10, 2014
Exposure apparatus, exposure method, and method for producing device
NIKON CORP1 citations61
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
5 patentsUS5835142ANov 10, 1998
Direct contact type image sensor and its production method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD61 citations96
US5477047ADec 19, 1995
Direct-contact type image sensor device, an image sensor unit, and methods for producing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD22 citations93
US5405809AApr 11, 1995
Semiconductor device, an image sensor device, and methods for producing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD38 citations93
US5408121AApr 18, 1995
Semiconductor device, an image sensor device, and methods for producing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations82
US5556809ASep 17, 1996
Direct-contact type image sensor device, an image sensor unit, and methods for producing the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63
FUKUDA METAL FOIL POWDER
2 patentsOJI PAPER CO
2 patentsMITA INDUSTRIAL CO LTD
2 patentsTOYOTA MOTOR CO LTD
2 patentsSAKATA SEED CORP
2 patentsSULZER METCO JAPAN LTD
1 patentHOYA CORP
1 patentNAKAGAWA MASAHIRO
1 patentTOHO BESLON CO
1 patentTOSHIBA KK
1 patentTOSHIBA MACHINE CO LTD
1 patentSUMITOMO ELECTRIC INDUSTRIES
1 patentTODA CORP
1 patentNTT INC
1 patentYAZAKI CORP
1 patentShowing the top 50 of 53 patents by PatentIndex Score.