| Number | Name | Date | Kind |
|---|---|---|---|
| 1582171 | Foss | Apr 1926 | |
| 2598011 | Pitre | May 1952 | |
| 2895252 | Tibbetts | Jul 1959 | |
| 3060619 | Cornick | Oct 1962 | |
| 3153876 | Multanen | Oct 1964 | |
| 3377734 | Snow | Apr 1968 | |
| 3453768 | Feaster et al. | Jul 1969 | |
| 5077931 | Marshall | Jan 1992 |
| Entry |
|---|
| Jann's Netcraft; The Complete Catalog; 1998; pp. 4-9. |
| Drawings from co-pending design application Serial No. 29/059,387. |
| Drawings from co-pending design application Serial No. 29/043,814. |