Granted Patent
Utility
US 5,021,995 · App. 06/809,985
Data exchange apparatus and methods
Inventors:
Jeanne M. Quint, John Martin Pratt
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: Dec 17, 1985
Inventors
Jeanne M. Quint
John Martin Pratt
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.