Granted Patent
Utility
US 4,893,685 · App. 07/296,571
Scale
Inventors:
Donald A. Bergman, Robert A. O'Neil
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Jan 12, 1989
Inventors
Donald A. Bergman
Robert A. O'Neil
Assignee (at issue)
Newell Limited
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.