Granted Patent
Utility
US 4,678,158 · App. 06/802,353
Injection mold including mold sidewall locking bars
Inventor:
Robert E. Brock
Patented Case
View Patent ↗
Granted: Jul 7, 1987
Filed: Nov 21, 1985
Inventor
Robert E. Brock
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.