Granted Patent
Utility
US 4,576,308 · App. 06/732,671
Tank hatch opening obstructing construction
Inventor:
Jeffrey R. Sullivan
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: May 10, 1985
Inventor
Jeffrey R. Sullivan
Assignee (at issue)
McGard LLC
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.