Granted Patent
Utility
US 4,520,281 · App. 06/349,433
Wide pulse range periodic reverse unit
Inventors:
Ralph R. Green, Robert C. Green
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Feb 16, 1982
Inventors
Ralph R. Green
Robert C. Green
Assignee (at issue)
Imperial Clevite 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.