Granted Patent
Utility
US 4,352,570 · App. 06/161,017
Vibratory treatment apparatus and method
Inventor:
Francis G. Firth
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Jun 19, 1980
Inventor
Francis G. Firth
Assignee (at issue)
Applied Plastics Co., 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.