Granted Patent
Utility
US 4,987,822 · App. 07/389,004
Linear actuator
Inventor:
Kurt Stoll
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Aug 2, 1989
Inventor
Kurt Stoll
Assignee (at issue)
Festo AG & Co. KG
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.