Granted Patent
Utility
US 4,201,504 · App. 05/896,320
O-ring stacking device and method
Inventors:
Robert Arnold, Raymond H. Warren
Patented Case
View Patent ↗
Granted: May 6, 1980
Filed: Apr 14, 1978
Inventors
Robert Arnold
Raymond H. Warren
Assignee (at issue)
Federal-Mogul 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.