Granted Patent
Utility
US 6,132,040 · App. 09/290,827
Auxiliary interlocking frame for eyeglasses
Inventor:
Tony Xin Xiao
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Apr 13, 1999
Inventor
Tony Xin Xiao
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.