Granted Patent
Utility
US 4,550,504 · App. 06/452,376
Method and apparatus for the measurement of the length of a straight line or an arc
Inventor:
Walter Mehnert
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Dec 22, 1982
Inventor
Walter Mehnert
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.