Granted Patent
Utility
US 4,502,151 · App. 06/547,772
Replaceable saliva barrier for intra-oral larynx
Inventors:
Craig A. Castle, Jon M. Benson, Theodore H. Toch
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Nov 1, 1983
Inventors
Craig A. Castle
Jon M. Benson
Theodore H. Toch
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.