Inventor
EBINUMA TADAYOSHI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “EBINUMA TADAYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KOTOBUKI & CO LTD
10 patentsUS5547301AAug 20, 1996
Writing instrument with rotatable advancement and retraction
KOTOBUKI & CO LTD29 citations92
US7008131B2Mar 7, 2006
Composite holding device
KOTOBUKI & CO LTD17 citations83
US6039485AMar 21, 2000
Double-chuck mechanical pencil
KOTOBUKI & CO LTD7 citations73
US5961237AOct 5, 1999
Writing instrument
KOTOBUKI & CO LTD6 citations73
US5810496ASep 22, 1998
Writing instrument
KOTOBUKI & CO LTD8 citations73
US4856693AAug 15, 1989
Working out container of bar shaped article
KOTOBUKI & CO LTD19 citations73
US5056947AOct 15, 1991
Dual refill-type writing utensil
KOTOBUKI & CO LTD17 citations72
US5165813ANov 24, 1992
Container with snap-in chuck and chuck ring
KOTOBUKI & CO LTD6 citations63
US6379067B2Apr 30, 2002
Double-chuck mechanical pencil
KOTOBUKI & CO LTD3 citations62
US4969763ANov 13, 1990
Lead forwarding mechanism retainer for thurst action mechanical pencil
KOTOBUKI & CO LTD2 citations62