Inventor

HSIEH CHIA-CHANG

TW2 patents

⚠️ This page may combine multiple inventors who share the name “HSIEH CHIA-CHANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

QISDA CORP

1 patent

US7445665B2Nov 4, 2008

Method for detecting the cleanliness of a filter

QISDA CORP48 citations87

BENQ CORP

1 patent

US7234818B2Jun 26, 2007

Dust detection device for air filter and projector utilizing the same

BENQ CORP4 citations55