Granted Patent
Utility
US 5,118,099 · App. 07/553,107
Articulated playground bridge
Inventor:
Ralph O. Vatterot
Patented Case
View Patent ↗
Granted: Jun 2, 1992
Filed: Jul 13, 1990
Inventor
Ralph O. Vatterot
Assignee (at issue)
Iron Mountain Forge 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.