Granted Patent
Utility
US 6,543,582 · App. 09/870,118
Information distribution system for use in an elevator
Inventors:
Michael J. DiFranza, Todd A. Newville
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: May 30, 2001
Inventors
Michael J. DiFranza
Todd A. Newville
Assignee (at issue)
Captivative Network, 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.