Granted Patent
Utility
US 6,301,057 · App. 09/494,228
Long focal length projection lenses
Inventor:
Melvyn H. Kreitzer
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Jan 31, 2000
Inventor
Melvyn H. Kreitzer
Assignee (at issue)
Corning Precision Lens, 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.