Granted Patent
Utility
US 4,593,216 · App. 06/422,937
Rotary stepping motor having improved construction
Inventor:
Frederick P. Willcox
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Sep 24, 1982
Inventor
Frederick P. Willcox
Assignee (at issue)
IBM Business Machines Corporation
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.