Granted Patent
Utility
US 6,554,030 · App. 09/812,156
Progressive punch
Inventors:
Nelson Cheung, Janusz Figiel, Peter Drabarek
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Mar 19, 2001
Inventors
Nelson Cheung
Janusz Figiel
Peter Drabarek
Assignee (at issue)
ILLINOIS TOOL WORKS INC.
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.