Inventor
KOIZUMI YUSUKE
JP9 patents
⚠️ This page may combine multiple inventors who share the name “KOIZUMI YUSUKE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
6 patentsUS11221686B2Jan 11, 2022
Multifunction pen
MITSUBISHI PENCIL CO2 citations68
US11472222B2Oct 18, 2022
Multifunction pen
MITSUBISHI PENCIL CO0 citations58
US12214616B2Feb 4, 2025
Mechanical pencil
MITSUBISHI PENCIL CO0 citations41
US11884093B2Jan 30, 2024
Mechanical pencil
MITSUBISHI PENCIL CO0 citations41
US10838520B2Nov 17, 2020
Handwriting input device
MITSUBISHI PENCIL CO0 citations40
US9649872B2May 16, 2017
Chuck body and mechanical pencil
MITSUBISHI PENCIL CO0 citations39