Granted Patent
Utility
US 4,364,663 · App. 06/262,057
Surface roughness gauge and method
Inventors:
Chester S. Gardner, William E. Streight
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Nov 17, 1980
Inventors
Chester S. Gardner
William E. Streight
Assignee (at issue)
Caterpillar Tractor Co.
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.