Granted Patent
Utility
US 4,594,684 · App. 06/768,749
System and method for measuring the area and dimensions of apertures in an opaque medium
Inventor:
Frank S. Krufka
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Oct 2, 1985
Inventor
Frank S. Krufka
Assignee (at issue)
RCA 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.