| Number | Name | Date | Kind |
|---|---|---|---|
| 2558428 | Fuller et al. | Jun 1951 | |
| 3359022 | Russell | Dec 1967 | |
| 4012880 | Logie | Mar 1977 | |
| 4086978 | Clements | May 1978 | |
| 4185422 | Radek | Jan 1980 | |
| 4370838 | Vermillion | Feb 1983 | |
| 4434900 | Cook | Mar 1984 | |
| 4587774 | Wendt | May 1986 | |
| 4615448 | Johnstonbaugh | Oct 1986 | |
| 4625477 | Johnstonbaugh | Dec 1986 |
| Number | Date | Country |
|---|---|---|
| 696764 | Oct 1965 | ITX |
| Entry |
|---|
| Van Huffel Tube Corp., .COPYRGT.1953, p. 20, Item located top extreme right of pg.#2981/.075. |