Inventor

YOKOYAMA KOUSEI

JP4 patents

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

HITACHI KOKI KK

2 patents

US7807293B2Oct 5, 2010

Battery pack and motor-driven tool using the same

HITACHI KOKI KK8 citations82

US9748534B2Aug 29, 2017

Electric tool and battery pack for the electric tool

HITACHI KOKI KK3 citations70

YOKOYAMA KOUSEI

1 patent

US8198835B2Jun 12, 2012

Cordless power tool and battery device used for same

YOKOYAMA KOUSEI46 citations90

HANAWA HIROYUKI

1 patent

US8684106B2Apr 1, 2014

Battery pack and motor-driven tool using the same

HANAWA HIROYUKI7 citations80