Granted Patent
Utility
US 4,903,956 · App. 07/264,724
Sheet stacking apparatus having positive control system for trailing sheet ends
Inventors:
David J. Stephens, Rodney G. Mader, Homer D. Durst, Sven Sonnenberg
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Oct 31, 1988
Inventors
David J. Stephens
Rodney G. Mader
Homer D. Durst
Sven Sonnenberg
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.