Inventor
YAMAGA MINORU
JP90 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGA MINORU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
33 patentsUS10720181B1Jul 21, 2020
Magnetic recording cartridge
SONY CORP75 citations98
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
US10748570B2Aug 18, 2020
Magnetic recording medium
SONY CORP13 citations93
US5169703ADec 8, 1992
Magnetic recording medium and method for production thereof
SONY CORP40 citations91
US11315594B2Apr 26, 2022
Magnetic recording medium having controlled dimensional variation
SONY CORP6 citations86
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
US10839847B2Nov 17, 2020
Magnetic recording medium having a dimensional variation
SONY CORP12 citations86
US10839846B2Nov 17, 2020
Magnetic recording medium having a dimensional variation
SONY CORP12 citations86
US10937457B2Mar 2, 2021
Magnetic recording medium
SONY CORP9 citations85
US11031033B2Jun 8, 2021
Magnetic recording medium and cartridge
SONY CORP6 citations84
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
US10204651B2Feb 12, 2019
Magnetic recording medium having cubic ferrite or e-phase iron oxide magnetic particles
SONY CORP6 citations83
US10923148B2Feb 16, 2021
Magnetic recording medium
SONY CORP12 citations82
US11676631B2Jun 13, 2023
Magnetic recording medium and cartridge
SONY CORP4 citations75
US12073861B2Aug 27, 2024
Magnetic recording medium
SONY CORP2 citations73
US11610604B2Mar 21, 2023
Magnetic recording medium, cartridge, and recording and reproducing device
SONY CORP2 citations73
US11538495B2Dec 27, 2022
Magnetic recording medium, magnetic recording/reproducing device, and magnetic recording medium cartridge
SONY CORP2 citations73
US11508407B2Nov 22, 2022
Magnetic recording medium having controlled dimensional characteristics
SONY CORP4 citations73
US11482245B2Oct 25, 2022
Tape-shaped magnetic recording medium including magnetic layer having recesses on a surface, magnetic recording/reproducing device, and magnetic recording medium cartridge
SONY CORP2 citations73
US11373681B2Jun 28, 2022
Cartridge memory used for tape cartridge, tape cartridge, data management system, and cartridge memory used for recording medium cartridge
SONY CORP2 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
US11302351B2Apr 12, 2022
High density magnetic recording medium and cartridge including high density magnetic recording medium
SONY CORP4 citations73
US11189314B2Nov 30, 2021
Magnetic recording medium
SONY CORP4 citations73
US11100945B2Aug 24, 2021
Servo pattern recording method, servo pattern recording apparatus, manufacturing method for a tape-like magnetic recording medium, and tapelike magnetic recording medium
SONY CORP3 citations73
US10755841B2Aug 25, 2020
Magnetic powder, method for production thereof, and magnetic recording medium
SONY CORP2 citations73
US11183209B2Nov 23, 2021
High density magnetic recording medium and cartridge
SONY CORP3 citations72
SONY GROUP CORP
15 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
US12198743B2Jan 14, 2025
Magnetic recording medium having controlled change in average width and cartridge
SONY GROUP CORP2 citations74
US11804243B2Oct 31, 2023
Magnetic recording medium
SONY GROUP CORP2 citations73
US11626128B2Apr 11, 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
US12417784B2Sep 16, 2025
Magnetic recording medium and cartridge
SONY GROUP CORP0 citations63
US12131763B2Oct 29, 2024
Magnetic recording medium
SONY GROUP CORP0 citations63
US11651781B2May 16, 2023
Tape-shaped magnetic recording medium and cartridge
SONY GROUP CORP0 citations63
US11495258B2Nov 8, 2022
Magnetic recording medium
SONY GROUP CORP0 citations63
US12367906B2Jul 22, 2025
Magnetic recording cartridge including magnetic recording medium having a variation in width
SONY GROUP CORP0 citations62
US12347457B2Jul 1, 2025
Cartridge including magnetic tape including magnetic layer including protrusions on surface thereof
SONY GROUP CORP0 citations62
US12293780B2May 6, 2025
Magnetic recording medium having a particular specific surface area, magnetic recording and reproducing apparatus, and magnetic recording medium cartridge
SONY GROUP CORP0 citations62
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
2 patentsShowing the top 50 of 90 patents by PatentIndex Score.