Granted Patent
Utility
US 4,776,953 · App. 07/007,923
Skimmer cover plate
Inventor:
Herman E. Frentzel
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Jan 28, 1987
Inventor
Herman E. Frentzel
Assignee (at issue)
Arneson Products, 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.