Number | Name | Date | Kind |
---|---|---|---|
2485280 | Grace | Oct 1949 | |
2877918 | Gardner | Mar 1959 | |
3556335 | Snyder | Jan 1971 | |
3589545 | Carpenter, Jr. | Jun 1971 | |
3687183 | Rohm | Aug 1972 | |
4018132 | Abe | Apr 1977 | |
4206851 | Ostrowsky | Jun 1980 | |
4266590 | McKewan | May 1981 | |
4294370 | Teoppen | Oct 1981 | |
4354609 | Hidding | Oct 1982 |
Entry |
---|
Modern Plastics, Apr. 1977, p. 49. |
Food & Drug Packaging, Apr. 1982, pp. 1 (portion), 14, 24, 44, 45, (with full scale photographs for pp. 24, 44, 45). |