Granted Patent
Utility
US 5,296,980 · App. 08/093,294
Magnetic disk apparatus having recording heads for opposite disk surfaces which are offset from each other
Inventors:
Takao Matsui, Yoshiaki Sonobe
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Jul 16, 1993
Inventors
Takao Matsui
Yoshiaki Sonobe
Assignee (at issue)
International 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.