Granted Patent
Utility
US 4,860,428 · App. 07/001,917
Lifting hand for a punch press tool changer
Inventors:
Theodore F. Brolund, Joel C. E. Arnesson
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Jan 9, 1987
Inventors
Theodore F. Brolund
Joel C. E. Arnesson
Assignee (at issue)
W.A. Whitney 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.