Granted Patent
Utility
US 4,858,052 · App. 07/178,759
Method and means for protecting converter circuits
Inventor:
John E. McDonnal
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Apr 4, 1988
Inventor
John E. McDonnal
Assignee (at issue)
RO Associates
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.