HK

Hidehei Kageyama

KC Kotobuki & Co.: 93 patents #1 of 77Top 2%
KC Kotobuki Printing Co.: 4 patents #2 of 4Top 50%
AC A.T. Cross Company: 2 patents #10 of 34Top 30%
ML Mitsubishi Pencil Company, Limited: 2 patents #127 of 302Top 45%
KK Kabushikikaisya Kotobuki: 1 patents #1 of 6Top 20%
TC The Gillette Company: 1 patents #936 of 1,479Top 65%
TC Toyopolymer Co.: 1 patents #5 of 19Top 30%
Overall (All Time): #13,556 of 4,157,543Top 1%
103
Patents All Time

Issued Patents All Time

Showing 51–75 of 103 patents

Patent #TitleCo-InventorsDate
6309129 Writing utensils Osamu Takahashi 2001-10-30
6227734 Knocking writing utensil Yoshio Noguchi 2001-05-08
6227739 Liquid container 2001-05-08
6210058 Side knock type mechanical pencil Tomiji Ueki, Yoshihide Mitsuya 2001-04-03
6176632 Liquid container Yoshio Noguchi, Tomohiro Fueki 2001-01-23
6155734 Rotary stick projecting device Yoshio Noguchi, Sachio Arai 2000-12-05
6116799 Installation structure of lead advancing mechanism in writing instrument 2000-09-12
6102602 Liquid container cap Yoshio Noguchi, Tomohiro Fueki 2000-08-15
6099182 Side knock-type mechanical pencil Tomiji Ueki, Yoshihide Mitsuya 2000-08-08
6082916 Mechanical pencil Yoshihide Mitsuya 2000-07-04
6039485 Double-chuck mechanical pencil Yoshihide Mitsuya, Tadayoshi Ebinuma 2000-03-21
6039484 Writing instrument Yoshihide Mitsuya 2000-03-21
5997200 Barrel with finger gripping means Yoshihide Mitsuya 1999-12-07
5988913 Double-chuck mechanical pencil Shouji Anzai, Yoshihide Mitsuya 1999-11-23
5988908 Barrel with finger gripping means Yoshihide Mitsuya 1999-11-23
5988914 Writing instrument Yoshihide Mitsuya 1999-11-23
5971644 Side knock-type writing instrument Tomiji Ueki, Yoshihide Mitsuya 1999-10-26
5947620 Double-chuck mechanical pencil Shouji Anzai, Tadashi Yamamoto, Yoshihide Mitsuya 1999-09-07
5890827 Bar extruding implement with ejector Shouji Anzai, Yoshihide Mitsuya 1999-04-06
5890825 Composite writing instrument Yoshio Noguchi, Seiichi Kobayashi, Naoki Sekuguchi 1999-04-06
5882132 Side knock-type mechanical pencil Yoshio Noguchi 1999-03-16
5836707 Side knock type mechanical pencil Tomiji Ueki, Yoshihide Mitsuya 1998-11-17
5791797 Side knock type mechanical pencil Tomiji Ueki, Yoshihide Mitsuya 1998-08-11
5702193 Side knock type mechanical pencil Tomiji Ueki, Yoshihide Mitsuya 1997-12-30
5535487 Clip attachment apparatus for a writing instrument Tadayoshi Ebinuma, Allen Drucker 1996-07-16