Granted Patent
Utility
US 4,274,187 · App. 06/050,181
Spring installation tool for article loading machine
Inventors:
P. Eric Painter, Curtis P. Fisher
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Jun 20, 1979
Inventors
P. Eric Painter
Curtis P. Fisher
Assignee (at issue)
ATO BV
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.