Granted Patent
Utility
US 6,431,452 · App. 09/772,358
Portable data collection device with variable focusing module for optic assembly
Inventor:
Chen Feng
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Jan 30, 2001
Inventor
Chen Feng
Assignee (at issue)
Metanetics 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.