Granted Patent
Utility
US 4,810,978 · App. 07/067,347
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Inventors:
Robert N. Sato, O. Glenn Ramer
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Jun 29, 1987
Inventors
Robert N. Sato
O. Glenn Ramer
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.