| Number | Name | Date | Kind |
|---|---|---|---|
| 2006705 | Bangs | Jul 1935 | A |
| 2844299 | Kessler et al. | Jul 1958 | A |
| 2979227 | Norton et al. | Apr 1961 | A |
| 5042260 | George, Sr. | Aug 1991 | A |
| 5094359 | DeMars et al. | Mar 1992 | A |
| 5263339 | Evans | Nov 1993 | A |
| 5441170 | Bane, III | Aug 1995 | A |
| 5558214 | Brundidge | Sep 1996 | A |
| 5615795 | Tipps | Apr 1997 | A |
| 5758513 | Smith | Jun 1998 | A |
| Entry |
|---|
| The Wiley Encyclopedia of Packaging Technology, John Wiley & Sons, pp. 66-69, 74, 75 (1986). |