Granted Patent
Utility
US 4,512,713 · App. 06/419,213
Vibration isolating means
Inventor:
Robert C. Berfield
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Sep 17, 1982
Inventor
Robert C. Berfield
Assignee (at issue)
SHOP VAC CORPORATION
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.