Granted Patent
Utility
US 4,717,866 · App. 06/855,608
Stepping motor excitation sequences
Inventor:
Roger M. Gray
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Apr 23, 1986
Inventor
Roger M. Gray
Assignee (at issue)
Archive 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.