Granted Patent
Utility
US 4,739,697 · App. 07/046,299
Brew chamber with filter spacer
Inventor:
Melvin F. Roberts
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: May 4, 1987
Inventor
Melvin F. Roberts
Assignee (at issue)
Bloomfield Industries, 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.