Granted Patent
Utility
US 4,341,137 · App. 06/081,046
Material forming apparatus
Inventors:
Paul A. Leitch, Thomas Shinn
Patented Case
View Patent ↗
Granted: Jul 27, 1982
Filed: Oct 2, 1979
Inventors
Paul A. Leitch
Thomas Shinn
Assignee (at issue)
Warner & Swasey
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.