Granted Patent
Utility
US 5,070,525 · App. 07/478,619
Method for avoiding call blocking
Inventors:
Aleksander Szlam, James W. Crooks, Jr., Charles L. Warner, II
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Feb 12, 1990
Inventors
Aleksander Szlam
James W. Crooks, Jr.
Charles L. Warner, II
Assignee (at issue)
Inventio AG
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.