Granted Patent
Utility
US 6,441,887 · App. 09/500,227
Measuring method and device
Inventor:
Po-Sung Kao
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Feb 8, 2000
Inventor
Po-Sung Kao
Assignee (at issue)
ASIA OPTICAL CO., INC.
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.