Granted Patent
Utility
US 6,823,571 · App. 09/490,259
Apparatus and method for manufacture of multilayer metal products
Inventors:
G. William Ragland, J. Bradley Pearce, Christopher V. Ragland
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Jan 24, 2000
Inventors
G. William Ragland
J. Bradley Pearce
Christopher V. Ragland
Assignee (at issue)
ATD Corporation
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.