Granted Patent
Utility
US 4,249,459 · App. 05/963,958
Fluid coupling for a rotary chuck
Inventor:
Samuel H. Pruden
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Nov 27, 1978
Inventor
Samuel H. Pruden
Assignee (at issue)
Cushman Industries, Incorporated
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.