Granted Patent
Utility
US 4,322,801 · App. 06/131,315
Method for controlling traffic flow
Inventors:
Richard A. Williamson, Derek Gitelson
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: Mar 18, 1980
Inventors
Richard A. Williamson
Derek Gitelson
Assignee (at issue)
Multisonics, 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.