Inventor
KITAZAWA KATSUNORI
JP9 patents
⚠️ This page may combine multiple inventors who share the name “KITAZAWA KATSUNORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL CO
8 patentsUS5595700AJan 21, 1997
Non-baked color pencil leads and method for preparing same
MITSUBISHI PENCIL CO34 citations90
US5911814AJun 15, 1999
Baked color pencil lead and process for producing the same
MITSUBISHI PENCIL CO6 citations71
US5645629AJul 8, 1997
Calcined pencil leads and method of manufacturing the same
MITSUBISHI PENCIL CO10 citations71
US5318622AJun 7, 1994
Non-baked color pencil leads and method for preparing same
MITSUBISHI PENCIL CO13 citations70
US6746524B1Jun 8, 2004
Process for producing sintered color pencil lead
MITSUBISHI PENCIL CO6 citations60
US6645279B1Nov 11, 2003
Baked colored pencil lead and process for producing the same
MITSUBISHI PENCIL CO4 citations60
US8349063B2Jan 8, 2013
Pencil lead and production process for the same
MITSUBISHI PENCIL CO0 citations49
US10023756B2Jul 17, 2018
Solid drawing material
MITSUBISHI PENCIL CO0 citations43