Granted Patent
Utility
US 4,408,521 · App. 06/291,578
Power press with automatic die changing system
Inventors:
William C. Schelli, III, William Sindelar, deceased
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Aug 10, 1981
Inventors
William C. Schelli, III
William Sindelar, deceased
Assignee (at issue)
Danly Machine 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.