GS

Gouji Sakaoka

PK Pentel Kabushiki Kaisha: 6 patents #8 of 170Top 5%
MC Micro Co.: 3 patents #6 of 31Top 20%
Overall (All Time): #586,750 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
6758617 Side knocking-type writing instrument 2004-07-06
5236271 Automatic mechanical pencil 1993-08-17
4729684 Mechanical pencil 1988-03-08
4650359 Mechanical pencil with automatic lead advance 1987-03-17
4521126 Mechanical pencil Takashi Ishikawa 1985-06-04
D269189 Mechanical pencil or similar article 1983-05-31
D260532 Casing for an eraser or the like 1981-09-01
D258217 Mechanical pencil or similar article 1981-02-10
4240759 Mechanical pencil having guides to match guides on a refill cartridge Kenji Matsumoto 1980-12-23