Granted Patent
Utility
US 4,240,648 · App. 05/814,597
Safety guard for work platforms
Inventor:
Darrel N. Starr
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jul 11, 1977
Inventor
Darrel N. Starr
Assignee (at issue)
Caterpillar Tractor Co.
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.