Granted Patent
Utility
US 4,642,740 · App. 06/663,656
Constant magnification light collection system
Inventor:
Thomas T. True
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Oct 22, 1984
Inventor
Thomas T. True
Assignee (at issue)
General Electric Company
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.