Granted Patent
Utility
US 4,533,115 · App. 06/482,502
Gladhand with dirt protection plug
Inventor:
Frederic Lissau
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Apr 6, 1983
Inventor
Frederic Lissau
Assignee (at issue)
Sloan Valve Company
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.