Granted Patent
Utility
US 4,387,842 · App. 06/245,552
Bulk material handler and feeder
Inventors:
Samuel B. Stevens, James Richard Lytle
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Mar 31, 1980
Inventors
Samuel B. Stevens
James Richard Lytle
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.