Granted Patent
Utility
US 4,254,652 · App. 06/043,881
Ironing die for ironing press
Inventor:
Harry P. Proctor
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Jun 4, 1979
Inventor
Harry P. Proctor
Assignee (at issue)
National Crane 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.