Granted Patent
Utility
US 6,285,155 · App. 09/430,586
Pseudo half-step motor drive method and apparatus
Inventors:
Rudolph J. Maske, Marc R. Bunyard, Peter A. Holst
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Oct 29, 1999
Inventors
Rudolph J. Maske
Marc R. Bunyard
Peter A. Holst
Assignee (at issue)
Abbott Laboratories
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.