Granted Patent
Utility
US 5,342,296 · App. 07/952,618
Method for draining antrum
Inventors:
Jan-Ove Persson, Lars Lejdeborn, Olle Berg
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Nov 23, 1992
Inventors
Jan-Ove Persson
Lars Lejdeborn
Olle Berg
Assignee (at issue)
Atos Medical AB
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.