Granted Patent
Utility
US 5,388,442 · App. 07/959,789
Lubrication and adhesion testing machine
Inventors:
Sudhir Kumar, James Cheng
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Oct 13, 1992
Inventors
Sudhir Kumar
James Cheng
Assignee (at issue)
Tranergy Corporation
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.