Inventor

HAMADA RYUSEI

JP5 patents

Patents

5 patents

USD823909SJul 24, 2018

Drill head

SUMITOMO ELECTRIC HARDMETAL CORP20 citations90

US10766077B2Sep 8, 2020

Cutting tool

SUMITOMO ELECTRIC HARDMETAL CORP2 citations71

USD1029060SMay 28, 2024

Drill holder

SUMITOMO ELECTRIC HARDMETAL CORP4 citations70

USD1029896SJun 4, 2024

Drill head

SUMITOMO ELECTRIC HARDMETAL CORP2 citations68

US12377474B2Aug 5, 2025

Drill head and drill

SUMITOMO ELECTRIC HARDMETAL CORP0 citations47