Patents/Inventors

Akiko Hirayama

Shinagawa-kuJP4 patents

5 Patents

US124418992025
Ink Composition for Water-based Ballpoint Pen
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US122029902025
Aqueous Ink Composition for Ballpoint Pen
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US121104012024
Aqueous Ink Composition for Writing Instrument
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US119870682024
Marking Pen
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US116346012023
Aqueous Ink Composition for Ballpoint Pen
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites