Granted Patent
Utility
US 4,391,363 · App. 06/235,395
Automatic latch for unloading auger
Inventor:
T. William Waldrop
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Feb 18, 1981
Inventor
T. William Waldrop
Assignee (at issue)
Sperry Corp.
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.