Granted Patent
Utility
US 4,866,547 · App. 07/176,516
Circuit for detecting the end of a tape by counting reel revolutions
Inventors:
David R. Rodal, Nathan W. Osborn
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Apr 1, 1988
Inventors
David R. Rodal
Nathan W. Osborn
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.