Granted Patent
Utility
US 4,083,033 · App. 05/684,448
Traffic control element
Inventors:
Jack H. Kulp, James M. Florsheim
Patented Case
View Patent ↗
Granted: Apr 4, 1978
Filed: May 7, 1976
Inventors
Jack H. Kulp
James M. Florsheim
Assignee (at issue)
Royal Industries Co., Ltd.
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.