Community partition based chat system easy to join for new members. - Keiji Gyohten; Yoshiyuki Hirayama (SMC (1), 2004)

Bladeless Dust Collection System to Prevent Scattering in Powder Feeding Process. - Nana Tsuruta; Michihiro Hakoda; Ken'ichi Yano; Yohei Nagamitsu; Yoshiyuki Hirayama (EMBC, 2024)