Granted Patent
Utility
US 4,285,612 · App. 06/047,117
Protective shoulder structure for roadway joints
Inventor:
Pier L. Betti
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Jun 11, 1979
Inventor
Pier L. Betti
Assignee (at issue)
Dinamyk Pesquisa E. Desenvolvimento Tecnologico S/C Ltda. Tecnologia de Solucoes
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.