Inventor

TAKAGISHI IKUO

JP2 patents

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

PENTEL KK

1 patent

US4966480AOct 30, 1990

Washing liquid cartridge for refill ink type writing instrument

PENTEL KK6 citations52

OTSUBO AYA

1 patent

US8771410B2Jul 8, 2014

Ink for ballpoint pens and ballpoint pen using same

OTSUBO AYA1 citations42