Granted Patent
Utility
US 4,470,835 · App. 06/441,345
Shaping sheets of glass or other deformable material to a complicated curvature
Inventors:
Michael T. Fecik, Robert G. Frank, John J. Ewing, George R. Claassen
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Nov 15, 1982
Inventors
Michael T. Fecik
Robert G. Frank
John J. Ewing
George R. Claassen
Assignee (at issue)
PPG Industries, 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.