Granted Patent
Utility
US 5,868,056 · App. 08/786,398
Bi-directional actuator for working tool
Inventors:
Craig E. Pfarr, Michael J. Wierman
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jan 17, 1997
Inventors
Craig E. Pfarr
Michael J. Wierman
Assignee (at issue)
DESIGNS SYSTEMS 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.