Granted Patent
Utility
US 4,179,228 · App. 05/926,930
Numerically controlled milling with parabolic profile tools for surface smoothness
Inventors:
Joseph Ari Ross, Howard Stern
Patented Case
View Patent ↗
Granted: Dec 18, 1979
Filed: Jul 21, 1978
Inventors
Joseph Ari Ross
Howard Stern
Assignee (at issue)
Solid Photography 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.