Granted Patent
Utility
US 6,336,357 · App. 09/270,266
Method and apparatus for sealing test materials
Inventors:
Henry Pawlowski, Xiaofeng Xu
Patented Case
View Patent ↗
Granted: Jan 8, 2002
Filed: Mar 15, 1999
Inventors
Henry Pawlowski
Xiaofeng Xu
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.