Granted Patent
Utility
US 6,389,705 · App. 09/534,080
Optical calibration plate and the assembling method for the same
Inventor:
Kun-Shiang Tsai
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Mar 24, 2000
Inventor
Kun-Shiang Tsai
Assignee (at issue)
Silitek Corporation
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.