Granted Patent
Utility
US 6,352,525 · App. 09/401,478
Portable modular chest drainage system
Inventor:
Akio Wakabayashi
Patented Case
View Patent ↗
Granted: Mar 5, 2002
Filed: Sep 22, 1999
Inventor
Akio Wakabayashi
Assignee (at issue)
Akio Wakabayashi
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.