Granted Patent
Utility
US 5,083,714 · App. 07/693,138
Vertical shaft impact crusher having a vertically adjustable feed tube
Inventors:
John C. Vendelin, Frederick J. Winegar
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Apr 29, 1991
Inventors
John C. Vendelin
Frederick J. Winegar
Assignee (at issue)
Cedarapids, Inc.
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.