Granted Patent
Utility
US 4,967,659 · App. 07/492,226
System for readily interchanging an adjustable printing head on a rotatable shaft
Inventors:
Eber L. Goodwin, Charles T. Richards
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Mar 13, 1990
Inventors
Eber L. Goodwin
Charles T. Richards
Assignee (at issue)
AM International, 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.