Granted Patent
Utility
US 6,532,661 · App. 09/826,092
Sheet feed shaft, apparatus for manufacturing same and method for manufacturing same
Inventors:
Sakae Tsukada, Eiji Tsukada
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Apr 4, 2001
Inventors
Sakae Tsukada
Eiji Tsukada
Assignee (at issue)
Kabushiki Kaisha Tsukada Nezi Seisakusho
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.