Granted Patent
Utility
US 5,712,721 · App. 08/530,224
Switchable lens
Inventor:
Timothy Andrew Large
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Oct 3, 1995
Inventor
Timothy Andrew Large
Assignee (at issue)
The Technology Partnership PLC
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.