Granted Patent
Utility
US 4,227,683 · App. 06/029,389
Stack height sensor and elevator control for a continuous forms refolder
Inventors:
Charles W. Spangler, Eugene S. Haymes
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Apr 12, 1979
Inventors
Charles W. Spangler
Eugene S. Haymes
Assignee (at issue)
General Electric Company
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.