Granted Patent
Utility
US 4,951,797 · App. 07/262,358
Electromagnetic coupling disc
Inventors:
Dwight E. Booth, Daniel Lee DeYoung
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Oct 25, 1988
Inventors
Dwight E. Booth
Daniel Lee DeYoung
Assignee (at issue)
DANA LIMITED
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.