Granted Patent
Utility
US 4,577,924 · App. 06/688,271
Optical recursive filter
Inventor:
Ronald F. Mathis
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Jan 2, 1985
Inventor
Ronald F. Mathis
Assignee (at issue)
General Dynamics Corporation, Electronics Division
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.