Granted Patent
Utility
US 4,387,539 · App. 06/248,802
Vibratory actuator
Inventor:
Kenneth J. Fewel
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Mar 30, 1981
Inventor
Kenneth J. Fewel
Assignee (at issue)
Hutson & Associates, 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.