Granted Patent
Utility
US 3,977,407 · App. 05/503,010
Nasotracheal tube holder
Inventors:
Steven J. Coleman, James W. O'Brien
Patented Case
View Patent ↗
Granted: Aug 31, 1976
Filed: Sep 3, 1974
Inventors
Steven J. Coleman
James W. O'Brien
Assignee (at issue)
Thermo Electron 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.