Innovative Hsien Chang Optical Industrial design patent for eyeglass frame – USD632721

September 13, 2017

This Hsien Chang Optical Industrial patent directed towards an eyeglass frame has been rated one of the most influential design patents in the field of photographic, cinematographic and optical apparatus. Hsien Chang Optical Industrial Co., Ltd. was awarded U.S. Patent D632721 entitled “Eyeglass frame” on February 15, 2011. The patent has been cited 97 times…
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