Granted Patent
Utility
US 4,249,326 · App. 06/038,983
Router bit
Inventor:
Russell D. Merkel
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Mar 5, 1979
Inventor
Russell D. Merkel
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.