Granted Patent
Utility
US 4,476,415 · App. 06/447,168
Feedback transducer
Inventors:
Thomas O. Kautz, Gerald A. Duenkel
Patented Case
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Granted: Oct 9, 1984
Filed: Dec 6, 1982
Inventors
Thomas O. Kautz
Gerald A. Duenkel
Assignee (at issue)
Johnson Service 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.