Granted Patent
Utility
US 4,348,964 · App. 06/189,259
Sliding sill low friction supporting plate assembly
Inventor:
Robert W. Randolph
Patented Case
View Patent ↗
Granted: Sep 14, 1982
Filed: Sep 22, 1980
Inventor
Robert W. Randolph
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.