Inventor
KOYANO JUNICHI
JP4 patents
Patents
4 patentsUS6744373B2Jun 1, 2004
Portable gas alarm device
RIKEN KEIKI KK31 citations87
US7086283B2Aug 8, 2006
Explosion-proof portable gas detector
RIKEN KEIKI KK12 citations81
US6712586B2Mar 30, 2004
Gas suction pump device, gas feed adapter and gas alarm unit
RIKEN KEIKI KK10 citations68
USD403603SJan 5, 1999
Wrist watch type gas measuring device
RIKEN KEIKI KK2 citations60