Granted Patent
Utility
US 4,267,721 · App. 06/092,723
Respiratory analyzer
Inventors:
Ned Longenecker, Clair M. Becker, David P. Riegel, Alan G. Vogt, Jr.
Patented Case
View Patent ↗
Granted: May 19, 1981
Filed: Nov 9, 1979
Inventors
Ned Longenecker
Clair M. Becker
David P. Riegel
Alan G. Vogt, Jr.
Assignee (at issue)
Timeter Instrument Corporation
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.