Granted Patent
Utility
US 5,194,972 · App. 07/837,571
Microwave phase modulation with liquid crystals
Inventors:
Khoon Cheng Lim, J. David Margerum, Anna M. Lackner, Leroy J. Miller
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Feb 18, 1992
Inventors
Khoon Cheng Lim
J. David Margerum
Anna M. Lackner
Leroy J. Miller
Assignee (at issue)
Hughes Aircraft 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.