Granted Patent
Utility
US 4,794,814 · App. 07/050,804
Mechanical stop
Inventor:
Milton T. Ferguson, Jr.
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: May 18, 1987
Inventor
Milton T. Ferguson, Jr.
Assignee (at issue)
PerkinElmer, 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.