Granted Patent
Utility
US 4,441,431 · App. 06/286,234
Railway hatch cover and strap safety tab latching assembly
Inventors:
John L. Carney, Jr., Richard L. Gilbert
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Jul 23, 1981
Inventors
John L. Carney, Jr.
Richard L. Gilbert
Assignee (at issue)
ACF Industries Incorporated
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.