Granted Patent
Utility
US 5,542,681 · App. 08/583,270
Graphite packing
Inventors:
Wilbur Dean Hutchens, Virgil W. Pepper, Frank E. Jensen
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: Jan 5, 1996
Inventors
Wilbur Dean Hutchens
Virgil W. Pepper
Frank E. Jensen
Assignee (at issue)
Fisher Controls International LLC
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.