Granted Patent
Utility
US 5,003,595 · App. 07/399,808
Secure dial access to computer systems
Inventors:
Cynthia B. Collins, Francis T. Lynch, Kay Mueller
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Aug 29, 1989
Inventors
Cynthia B. Collins
Francis T. Lynch
Kay Mueller
Assignee (at issue)
AT&T Bell Laboratories
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.