Granted Patent
Utility
US 4,881,891 · App. 07/296,184
Mold side wall locking apparatus
Inventor:
LeRoy D. Luther
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Jan 11, 1989
Inventor
LeRoy D. Luther
Assignee (at issue)
Triangle Tool 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.