Inventor

TOYAMA MATSUHEI

JP5 patents

Patents

5 patents

US5911534AJun 15, 1999

Cap for writing tool

ZEBRA CO LTD21 citations89

US5888009AMar 30, 1999

Writing tool and pressurizing cap

ZEBRA CO LTD10 citations70

US5927888AJul 27, 1999

Cap for writing instruments

ZEBRA CO LTD4 citations59

US6042290AMar 28, 2000

Writing tool

ZEBRA CO LTD5 citations58

US7972072B2Jul 5, 2011

Retractable writing implement

ZEBRA CO LTD4 citations57