Granted Patent
Utility
US 5,218,522 · App. 07/845,074
D.C. chopper regulating method and apparatus incorporating bilateral regulating voltage path
Inventors:
Thomas K. Phelps, KHANH TUAN LE, Gilbert I. Cardwell, Jr.
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Mar 3, 1992
Inventors
Thomas K. Phelps
KHANH TUAN LE
Gilbert I. Cardwell, Jr.
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.