Granted Patent
Utility
US 5,277,513 · App. 07/805,571
Snowplowable pavement marker using different materials
Inventors:
Robert M. Flanagan, Sidney A. Heenan, Henry R. Krepel, Richard M. Steere
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Dec 10, 1991
Inventors
Robert M. Flanagan
Sidney A. Heenan
Henry R. Krepel
Richard M. Steere
Assignee (at issue)
Stimsonite 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.