Granted Patent
Utility
US 4,628,783 · App. 06/683,532
Method of making a grooved medical tube
Inventors:
Richard G. Brownell, James L. Fehl
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Dec 19, 1984
Inventors
Richard G. Brownell
James L. Fehl
Assignee (at issue)
Sherwood Medical Company
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.