Patents/Inventors

Hiroyuki Saitou

IbarakiJP1 patent

2 Patents

US116977432023
Ink Composition, Writing Instrument and Method for Producing Ink Composition
PENTEL KABUSHIKI KAISHA
0 cites
US116136632023
Ink Composition, Writing Tool and Method for Producing Ink Composition
PENTEL KABUSHIKI KAISHA
0 cites