Granted Patent
Utility
US 4,717,896 · App. 06/715,129
Balun
Inventor:
Martin H. Graham
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Mar 21, 1985
Inventor
Martin H. Graham
Assignee (at issue)
And Yet, 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.