Granted Patent
Utility
US 4,943,137 · App. 07/252,106
Multi-channel, off-axis, bi-directional fiber optic slipring
Inventor:
J. Alexander Speer
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Oct 3, 1988
Inventor
J. Alexander Speer
Assignee (at issue)
KDI Electro-Tec 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.