Inventor · disambiguated record
An-Chao Chang
Also filed as: CHANG AN-CHAO
2 granted patents·3 pending applications·9 citations·filing 2008–2011
47Inventor score
Top patents by PatentIndex Score
5 records- 0171US8418493B2Refrigerant recovery machine with improved cam wheel assemblyCHANG AN-CHAO·Filed 2009·Granted Apr 16, 2013·9 cites·6 claims
- 0240US2011132018A1Electronic instrument for refrigerant recovery machineSUN WONDER IND CO LTD·Filed 2009·Application pending·0 cites
- 0329US2011280754A1Cam-type pump structure for a refrigerant recycling machineCHANG AN CHAO·Filed 2010·Application pending·0 cites
- 0428US8616083B2Cam wheel assembly for refrigerant recovery machineCHANG AN-CHAO·Filed 2011·Granted Dec 31, 2013·0 cites·6 claims
- 0528US2011083492A1Leakage Detection DeviceCHANG AN-CHAO·Filed 2008·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →