Information transmission system using bell

Assignee

• Koizumi Factory

Inventors

• Toshihiro Koizumi (12 patents)
• Hironori Ogawa (36 patents)
• Keiichi Osaku (1 patents)
• Dankan Arekusanda Eriku Shoton (1 patents)
• Masaru Mizuochi (1 patents)
• Mio Omura (1 patents)

View full patent text on Google Patents →