Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667897 | Plate glass edge strength | David N. Heilman | 1997-09-16 |
| 5545277 | Plate glass edge strength | David N. Heilman | 1996-08-13 |
| 5525138 | Determination of tensile membrane stress and compressive layer thickness in tempered glass using a CO.sub.2 laser beam | David N. Heilman | 1996-06-11 |
| 5383950 | Apparatus for supporting a glass sheet during a tempering process | Robert A. Hill | 1995-01-24 |
| 5254149 | Process for determining the quality of temper of a glass sheet using a laser beam | Timothy Kelly | 1993-10-19 |