They originate in Taiwan, but they have a company registered in Fountain Valley, California. Company number C1362992, registered since 1986.

http://www.bloomberg.com/research/stocks/private/snapshot.as...

Feel free to search for it on the California Secretary of State's website: https://businesssearch.sos.ca.gov/

If they have legal incorporation in the United States, it is fair game for the FTC to go after their US-based company for failure to protect US consumers. Don't want legal liability in the US for your business activity, don't incorporate in the US.