Granted Patent
Utility
US 4,677,508 · App. 06/831,857
Endwise loaded cartridge tape drive
Inventors:
William M. Barton, Jr., John F. Murphy, Karl B. Offerman, Richard G. Fisher
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Feb 24, 1986
Inventors
William M. Barton, Jr.
John F. Murphy
Karl B. Offerman
Richard G. Fisher
Assignee (at issue)
Cipher Data Products, 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.