Granted Patent
Utility
US 5,327,850 · App. 07/735,321
Roadway marker
Inventors:
Michael W. Sly, Peter A. Speer, Harry J. Glutting
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jul 24, 1991
Inventors
Michael W. Sly
Peter A. Speer
Harry J. Glutting
Assignee (at issue)
Davidson Plastics Corporation
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.