| Number | Name | Date | Kind |
|---|---|---|---|
| D232104 | Baigue | Jul 1974 | |
| D267904 | Hampel et al. | Feb 1983 | |
| D267905 | Keith | Feb 1983 | |
| D288733 | Welker | Mar 1987 | |
| D320479 | Cheval et al. | Oct 1991 | |
| D343481 | Hampel | Jan 1994 | |
| 2732826 | Dawson | Jan 1956 | |
| 3129693 | DeVore | Apr 1964 | |
| 3172392 | Schultz | Mar 1965 | |
| 4161924 | Welker | Jul 1979 | |
| 4201153 | Nace | May 1980 | |
| 4495892 | Jodar et al. | Jan 1985 |
| Entry |
|---|
| Better Homes & Gardens; Sep. 1973; p. 66; Canine Castle advertisment. |
| Igloo Dog Homes advertisement in Joan Cook Catalog; Feb. 4, 1987; p. 48; Litter Box. |
| Hampel Corporation brochure for Pig-tel.TM. brooder box for piglets. |
| Agri-Plastics brochure for Box Hover piglet shelter. |
| Palco brochure for Poly Hot Box Piglets. |