Granted Patent
Utility
US 4,736,865 · App. 07/063,824
Engine block plug
Inventor:
Brian F. Rericha
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Jun 19, 1987
Inventor
Brian F. Rericha
Assignee (at issue)
Microdot Inc.
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.