Granted Patent
Utility
US 4,376,254 · App. 06/272,252
Annular molded article secured to a shaft
Inventor:
John V. Hellmann
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Jun 10, 1981
Inventor
John V. Hellmann
Assignee (at issue)
General Motors 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.