Granted Patent
Utility
US 4,560,924 · App. 06/516,828
Flatness measuring apparatus
Inventor:
Robert Burton Nordberg
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Jul 22, 1983
Inventor
Robert Burton Nordberg
Assignee (at issue)
Magnetic Peripherals, 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.