| Number | Name | Date | Kind |
|---|---|---|---|
| D168835 | Freeman | Feb 1953 | |
| D269323 | Cillario | Jun 1983 | |
| D320743 | Alexander et al. | Oct 1991 | |
| D340625 | Wang | Oct 1993 | |
| D341501 | Tiramani et al. | Nov 1993 | |
| D345305 | Host | Mar 1994 | |
| D349207 | Wolff | Aug 1994 | |
| 2681142 | Cohen | Jun 1954 | |
| 4061241 | Retelny | Dec 1977 | |
| 4795056 | Meyers | Jan 1989 | |
| 5037679 | Noble, Jr. | Aug 1991 |
| Number | Date | Country |
|---|---|---|
| 1074246 | Oct 1954 | FRX |
| Entry |
|---|
| Package Engineering, Feb. 1980, p. 55. |
| Modern Packaging, Nov. 1958, p. 348. |