Inventor
SEKIGUCHI NOBORU
JP42 patents
⚠️ This page may combine multiple inventors who share the name “SEKIGUCHI NOBORU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
26 patentsUS10720181B1Jul 21, 2020
Magnetic recording cartridge
SONY CORP75 citations98
US9542967B2Jan 10, 2017
Magnetic recording medium
SONY CORP102 citations97
US10984833B2Apr 20, 2021
Magnetic recording cartridge
SONY CORP25 citations94
US10803904B1Oct 13, 2020
Magnetic recording cartridge
SONY CORP29 citations94
US10665259B1May 26, 2020
Magnetic recording medium and cartridge
SONY CORP33 citations94
US11302354B2Apr 12, 2022
Magnetic recording medium having controlled dimensional variation
SONY CORP6 citations86
US11017809B2May 25, 2021
Magnetic recording medium having a controlled dimensional variation
SONY CORP10 citations86
US10978104B2Apr 13, 2021
Magnetic recording medium having a dimensional variation and cartridge
SONY CORP13 citations86
US10839846B2Nov 17, 2020
Magnetic recording medium having a dimensional variation
SONY CORP12 citations86
US10937457B2Mar 2, 2021
Magnetic recording medium
SONY CORP9 citations85
US10964346B2Mar 30, 2021
Magnetic recording medium and cartridge
SONY CORP8 citations84
US10867630B2Dec 15, 2020
Magnetic recording medium having a dimensional variation
SONY CORP10 citations84
US11056143B2Jul 6, 2021
Magnetic recording medium
SONY CORP7 citations83
US11676631B2Jun 13, 2023
Magnetic recording medium and cartridge
SONY CORP4 citations75
US11508407B2Nov 22, 2022
Magnetic recording medium having controlled dimensional characteristics
SONY CORP4 citations73
US11302353B2Apr 12, 2022
Magnetic recording medium having controlled dimensional variation
SONY CORP4 citations73
US11302355B2Apr 12, 2022
Magnetic recording medium having controlled dimensional variation
SONY CORP4 citations73
US11189314B2Nov 30, 2021
Magnetic recording medium
SONY CORP4 citations73
US10424329B2Sep 24, 2019
Magnetic recording medium
SONY CORP4 citations72
US9299378B2Mar 29, 2016
Magnetic recording medium having a recording layer with a diffraction peak of magnetic atoms
SONY CORP4 citations71
US10580447B2Mar 3, 2020
Magnetic recording medium with controlled surface characteristics
SONY CORP2 citations70
US11621020B2Apr 4, 2023
Magnetic recording medium
SONY CORP0 citations61
US11468910B2Oct 11, 2022
Magnetic recording medium having reinforced substrate
SONY CORP0 citations59
US6964093B2Nov 15, 2005
System for mounting electronic device
SONY CORP6 citations55
US11423936B2Aug 23, 2022
Magnetic recording medium and method of producing the same
SONY CORP0 citations50
US6991861B2Jan 31, 2006
Magnetic recording medium
SONY CORP0 citations50
SONY GROUP CORP
11 patentsUS11521650B2Dec 6, 2022
Magnetic recording medium having a controlled dimensional variation
SONY GROUP CORP7 citations86
US11854585B2Dec 26, 2023
Magnetic recording medium and cartridge
SONY GROUP CORP6 citations83
US11804243B2Oct 31, 2023
Magnetic recording medium
SONY GROUP CORP2 citations73
US11250884B2Feb 15, 2022
Magnetic recording cartridge
SONY GROUP CORP3 citations73
US12243569B2Mar 4, 2025
Magnetic recording medium and cartridge
SONY GROUP CORP4 citations72
US12562188B2Feb 24, 2026
Servo reproduction apparatus, servo reproduction head, reproduction head, and method of producing a magnetic tape
SONY GROUP CORP0 citations63
US12131763B2Oct 29, 2024
Magnetic recording medium
SONY GROUP CORP0 citations63
US11862212B2Jan 2, 2024
Magnetic recording medium and servo signal recording device
SONY GROUP CORP1 citations62
US11631430B2Apr 18, 2023
Magnetic recording medium
SONY GROUP CORP0 citations62
US12462840B2Nov 4, 2025
Magnetic recording medium and cartridge
SONY GROUP CORP0 citations52
US12400682B2Aug 26, 2025
Magnetic recording medium and cartridge
SONY GROUP CORP0 citations52