| All Patents in class 451/381 |
Patents 1 -
8
of 8
      |
| Number | Title | Classification(s) |
| 17,960 | Making Glassware | 269/254R, 269/3, 451/381 |
| 122,920 | Improvement in Expanding Mandrels | 451/381, 82/169 |
| 163,217 | Expanding Mandrel | 192/75, 242/571.8, 279/2.17, 279/2.22, 451/381, 5/133, 81/436, 81/447, 82/168, 82/169 |
| 667,579 | Apparatus for Grinding and Smoothing Glass | 451/246, 451/247, 451/381, 451/396 |
| 1,976,109 | Grinding Machine | 279/155, 279/2.04, 451/246, 451/334, 451/381, 82/19 |
| 2,000,216 | Grinding machine | 279/23.1, 451/227, 451/237, 451/276, 451/281, 451/381, 451/394 |
| 2,535,199 | Gear holding diaphragm chuck | 279/133, 279/136, 279/139, 451/381 |
| 3,038,280 | Internal Stock Divider | 279/136, 279/2.19, 409/61, 451/381, 451/460 |
