HH

Hirofumi Hamamoto

TC The Sailor Pen Co.: 2 patents #2 of 26Top 8%
Overall (All Time): #2,297,853 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5362169 Applicator having cap which pressurizes inner space Hideshi Okamoto 1994-11-08
4547946 Method for producing a nondirectional pen Kazuhiko Osaki, Junzi Kurokawa, Shigeru Akieda 1985-10-22