Granted Patent
Utility
US 5,989,722 · App. 09/085,238
Reduced pressure device and method of making
Inventors:
Tadahiro Ohmi, Masaru Umeda
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 27, 1998
Inventors
Tadahiro Ohmi
Masaru Umeda
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.