Granted Patent
Utility
US 4,646,988 · App. 06/719,958
Tube gripper
Inventor:
Arlin L. Campbell
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Apr 4, 1985
Inventor
Arlin L. Campbell
Assignee (at issue)
Burlington Industries LLC
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.