Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7696115 | Sag control of isopipes used in making sheet glass by the fusion process | John D. Helfinstine, John L. Martin, Dean Veral Neubauer, William R. Powell | 2010-04-13 |
| 7541304 | Sag control of isopipes used in making sheet glass by the fusion process | John D. Helfinstine, John L. Martin, Dean Veral Neubauer, William R. Powell | 2009-06-02 |
| 7414001 | Sag control of isopipes used in making sheet glass by the fusion process | John D. Helfinstine, John L. Martin, Dean Veral Neubauer, William R. Powell | 2008-08-19 |
| 7259119 | Sag control of isopipes used in making sheet glass by the fusion process | John D. Helfinstine, John L. Martin, Dean Veral Neubauer, William R. Powell | 2007-08-21 |
| 6974786 | Sag control of isopipes used in making sheet glass by the fusion process | John D. Helfinstine, John L. Martin, Dean Veral Neubauer, William R. Powell | 2005-12-13 |