Granted Patent
Utility
US 4,500,847 · App. 06/388,291
Transistor amplifier variable matching transformer apparatus
Inventor:
Ben R. Hallford
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Jun 14, 1982
Inventor
Ben R. Hallford
Assignee (at issue)
Rockwell International 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.