Granted Patent
Utility
US 4,922,116 · App. 07/370,109
Flicker free infrared simulator with resistor bridges
Inventors:
Jan Grinberg, Murray S. Welkowsky
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Jun 21, 1989
Inventors
Jan Grinberg
Murray S. Welkowsky
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.