Inventor
CHANG SHAN-WEN
TW17 patents
⚠️ This page may combine multiple inventors who share the name “CHANG SHAN-WEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
APPA TECHNOLOGY CORP
11 patentsUSD601047SSep 29, 2009
Electric meter (I)
APPA TECHNOLOGY CORP24 citations92
USD515952SFeb 28, 2006
Multimeter
APPA TECHNOLOGY CORP20 citations92
US6646562B1Nov 11, 2003
Hooking-type fully automatic electric meter
APPA TECHNOLOGY CORP23 citations92
USD472828SApr 8, 2003
Electrical multimeter
APPA TECHNOLOGY CORP23 citations92
USD472830SApr 8, 2003
Clamp type electrical multimeter (II)
APPA TECHNOLOGY CORP20 citations92
USD628918SDec 14, 2010
Hooking-type electric meter
APPA TECHNOLOGY CORP10 citations83
USD585315SJan 27, 2009
Electric meter (II)
APPA TECHNOLOGY CORP16 citations83
USD585316SJan 27, 2009
Electric meter (III)
APPA TECHNOLOGY CORP8 citations83
USD517434SMar 21, 2006
Clamp multimeter
APPA TECHNOLOGY CORP14 citations83
USD515953SFeb 28, 2006
Clamp multimeter
APPA TECHNOLOGY CORP10 citations73
USD472829SApr 8, 2003
Clamp type electrical multimeter (I)
APPA TECHNOLOGY CORP10 citations73