Granted Patent
Utility
US 5,969,876 · App. 09/246,346
Projection lenses having large back focal length to focal length ratios
Inventors:
Melvyn H. Kreitzer, Jacob Moskovich
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Feb 8, 1999
Inventors
Melvyn H. Kreitzer
Jacob Moskovich
Assignee (at issue)
U.S. Precision Lens Incorporated
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.