Inventor
SANO YOJIRO
JP12 patents
⚠️ This page may combine multiple inventors who share the name “SANO YOJIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
10 patentsUS6435747B2Aug 20, 2002
Double ended direct-feed type writing implement
MITSUBISHI PENCIL CO14 citations83
US6769827B2Aug 3, 2004
Collector type writing implement
MITSUBISHI PENCIL CO11 citations73
US6619870B2Sep 16, 2003
Collector type writing implement
MITSUBISHI PENCIL CO7 citations73
US6974272B2Dec 13, 2005
Writing instrument cap
MITSUBISHI PENCIL CO2 citations62
US6966718B2Nov 22, 2005
Writing instrument, writing instrument cap and method of assembly of a writing instrument cap
MITSUBISHI PENCIL CO4 citations62
US6619871B2Sep 16, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO6 citations62
US6602012B2Aug 5, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO4 citations62
US6588963B2Jul 8, 2003
Collector type writing instrument
MITSUBISHI PENCIL CO4 citations62
US6371676B1Apr 16, 2002
Collector for a writing implement
MITSUBISHI PENCIL CO4 citations62
US7223037B2May 29, 2007
Production processes for writing instrument and ink occlusion body
MITSUBISHI PENCIL CO1 citations51