Granted Patent
Utility
US 4,886,408 · App. 07/239,467
Bowed external spring retaining ring of the E-shaped type
Inventors:
Edmund F. Killian, Wallace H. Berliner
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Sep 1, 1988
Inventors
Edmund F. Killian
Wallace H. Berliner
Assignee (at issue)
Waldes Truarc, 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.