Granted Patent
Utility
US 5,423,653 · App. 08/163,926
Disc-transporting mandrel
Inventor:
Bruce M. Harper
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Dec 8, 1993
Inventor
Bruce M. Harper
Assignee (at issue)
HMT Technology 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.