Inventor · disambiguated record

Hsien-Chin Chang

Also filed as: CHANG HSIEN-CHIN

2 granted patents·8 citations·filing 2007–2009

52Inventor score

Technology areasD05B

Files withSEWTECH CORP2

Top patents by PatentIndex Score

2 records

0169US7347152B1Adjustable positioning device for head of sewing machineSEWTECH CORP·Filed 2007·Granted Mar 25, 2008·6 cites·10 claims
0245US8051788B2Driving device for thread hooking mechanism for sewing machineSEWTECH CORP·Filed 2009·Granted Nov 8, 2011·2 cites·4 claims

Join the waitlist — get patent alerts

Get an alert when Hsien-Chin Chang files or is granted a new patent.

We store only your email — no account needed. See our privacy policy.

Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →