Granted Patent
Utility
US 4,864,636 · App. 07/016,561
Crystal controlled transmitter
Inventor:
Robert E. Brunius
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Feb 19, 1987
Inventor
Robert E. Brunius
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.