Granted Patent
Utility
US 4,712,544 · App. 06/828,472
Electrosurgical generator
Inventor:
Frieder H. Ensslin
Patented Case
View Patent ↗
Granted: Dec 15, 1987
Filed: Feb 12, 1986
Inventor
Frieder H. Ensslin
Assignee (at issue)
Castle, Inc.
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.