Granted Patent
Utility
US 5,280,402 · App. 07/917,523
Combined stepper motor and voice coil head positioning apparatus
Inventors:
James S. Anderson, Noel L. Allen, Durkee B. Richards, Theodore A. Schwarz, Robert W. Tapani, Hung T. Tran, Robert J. Youngquist
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Jul 17, 1992
Inventors
James S. Anderson
Noel L. Allen
Durkee B. Richards
Theodore A. Schwarz
Robert W. Tapani
Hung T. Tran
Robert J. Youngquist
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.