Granted Patent
Utility
US 4,415,906 · App. 06/284,045
Magnetic recording heads
Inventors:
Houshang Rasekhi, Alfred M. Nelson, James P. Johnston, Frederick A. Rupinski, Walter Hatfield
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Jul 17, 1981
Inventors
Houshang Rasekhi
Alfred M. Nelson
James P. Johnston
Frederick A. Rupinski
Walter Hatfield
Assignee (at issue)
Wang Laboratories, Inc.
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.