Granted Patent
Utility
US 6,772,521 · App. 10/074,535
Hydraulic punch driver
Inventors:
William F. Nordlin, Thomas G. Boese
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Nov 13, 2001
Inventors
William F. Nordlin
Thomas G. Boese
Assignee (at issue)
GREENLEE TEXRON 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.