Granted Patent
Utility
US 5,556,375 · App. 08/260,583
Wound dressing having a fenestrated base layer
Inventor:
Ralph Ewall
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: Jun 16, 1994
Inventor
Ralph Ewall
Assignee (at issue)
HERCULES 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.