Granted Patent
Utility
US 4,803,977 · App. 07/030,595
Method and apparatus for the diagnosis of respiratory diseases and allergies
Inventor:
Carl P. Kremer, Jr.
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Mar 27, 1987
Inventor
Carl P. Kremer, Jr.
Assignee (at issue)
MALLINCKRODT LLC
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.