Granted Patent
Utility
US 4,673,825 · App. 06/702,313
Uninterruptible power supply with isolated bypass winding
Inventors:
William J. Raddi, Robert W. Johnson, John G. Tracy, Blazej W. Sonnenberg
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Feb 15, 1985
Inventors
William J. Raddi
Robert W. Johnson
John G. Tracy
Blazej W. Sonnenberg
Assignee (at issue)
Exide Electronics 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.