Granted Patent
Utility
US 4,493,701 · App. 06/409,671
Wound drainage device of resilient sidewalls with a constant rate of recovery
Inventors:
Matthew W. Bootman, Peter Schillke, Stephen W. Laguette
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Aug 19, 1982
Inventors
Matthew W. Bootman
Peter Schillke
Stephen W. Laguette
Assignee (at issue)
American Hospital Supply Corp.
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.