Granted Patent
Utility
US 4,493,166 · App. 06/432,475
Ultra precise tool forming apparatus
Inventors:
Howard G. Lange, Francis M. Ray
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Oct 4, 1982
Inventors
Howard G. Lange
Francis M. Ray
Assignee (at issue)
Zenith Electronics LLC
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.