Granted Patent
Utility
US 4,733,237 · App. 06/689,524
FM/chirp detector/analyzer and method
Inventors:
John T. Apostolos, Chester E. Stromswold
Patented Case
View Patent ↗
Granted: Mar 22, 1988
Filed: Jan 7, 1985
Inventors
John T. Apostolos
Chester E. Stromswold
Assignee (at issue)
Sanders GmbH
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.