Granted Patent
Utility
US 5,518,002 · App. 08/140,752
Portable electronic spirometric device
Inventors:
James L. Wolf, Daniel V. Sallis
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Oct 22, 1993
Inventors
James L. Wolf
Daniel V. Sallis
Assignee (at issue)
Medtrac Technologies, 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.