Granted Patent
Utility
US 5,390,107 · App. 08/054,710
Checkout lane alert system and method
Inventors:
John D. Nelson, Ronald G. Frey
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Apr 28, 1993
Inventors
John D. Nelson
Ronald G. Frey
Assignee (at issue)
Datatec Industries 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.