Patents/Inventors

Takayuki Ikai

TokyoJP3 patents

3 Patents

US125596372026
Coloring Tablet and Water-based Ink Composition for Writing Instrument Using the Same
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US120546222024
Oil-based Ink Composition for Writing Utensils, Writing Utensil Using Same, and Airbrush Unit Using Same
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites
US116547112023
Writing Tool Provided with Refill
MITSUBISHI PENCIL COMPANY, LIMITED
0 cites