Number | Name | Date | Kind |
---|---|---|---|
D190735 | Boldt | Jun 1961 | |
D190736 | Boldt | Jun 1961 | |
D243194 | Nordberg et al. | Jan 1977 | |
D271201 | Nordberg | Nov 1983 | |
D271765 | Nordberg | Dec 1983 |
Entry |
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Bell Catalog, 1980, p. 294, Item "D". |
TV Communications, 2/81, p. 123, Digital TV Converter. |
TV Communications, 4/81, p. 79, Digital TV Converter. |