Granted Patent
Utility
US 3,995,761 · App. 05/610,368
Anti-lowering device for a boom loader
Inventor:
Joseph C. Hurlburt
Patented Case
View Patent ↗
Granted: Dec 7, 1976
Filed: Sep 4, 1975
Inventor
Joseph C. Hurlburt
Assignee (at issue)
Sperry Rand Corporation
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.