Granted Patent
Utility
US 4,451,892 · App. 06/229,052
Method of and apparatus for measuring distances in numerically controlled machine tools
Inventor:
David R. McMurtry
Patented Case
View Patent ↗
Granted: May 29, 1984
Filed: Jan 27, 1981
Inventor
David R. McMurtry
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.