Granted Patent
Utility
US 4,547,894 · App. 06/547,753
Replaceable battery pack for intra-oral larynx
Inventors:
Jon M. Benson, Craig A. Castle
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Nov 1, 1983
Inventors
Jon M. Benson
Craig A. Castle
Assignee (at issue)
Xomed, Inc.
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.