Granted Patent
Utility
US 4,509,358 · App. 06/593,449
Urethane dies
Inventor:
William G. Krowl
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Mar 26, 1984
Inventor
William G. Krowl
Assignee (at issue)
Chrysler Group LLC
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.