Granted Patent
Utility
US 4,252,329 · App. 06/014,925
Semi-unitized shaft seal
Inventor:
Edward Messenger
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Feb 26, 1979
Inventor
Edward Messenger
Assignee (at issue)
Garlock, Inc.
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.