The UL sticker on the outlet itself shows E231858 which comes back as:
KCXS.E231858 Ground-fault Circuit Interrupters
GENERAL PROTECHT GROUP INC E231858 555 DAXING RD W LIUSHI YUEQING, ZHEJIANG 325600 CHINA
This is the same name as on the wiring instructions inside the box, but the device itself doesn't show any type of mfr name, just a symbol that looks like "bp"
