Inventor

OHTANI RYOICHI

3 patents

Patents

3 patents

US4587543AMay 6, 1986

Method and device for detecting metal ions

TOKYO SHIBAURA ELECTRIC CO4 citations59

US4297873ANov 3, 1981

Plugging device

TOKYO SHIBAURA ELECTRIC CO2 citations58

US4274280AJun 23, 1981

Plugging indicator

TOKYO SHIBAURA ELECTRIC CO3 citations58