Granted Patent
Utility
US 4,416,563 · App. 06/362,778
Shaft coupling device
Inventors:
Edward H. Zemke, Kenneth L. Guenther, Friedrich W. Baethke
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Mar 29, 1982
Inventors
Edward H. Zemke
Kenneth L. Guenther
Friedrich W. Baethke
Assignee (at issue)
Bell and Howell, 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.