Number | Date | Country | Kind |
---|---|---|---|
55-109099[U] | Jul 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3420051 | Matteson | Jan 1969 | |
3704345 | Coker et al. | Nov 1972 | |
3835640 | Hughes, Jr. | Sep 1974 | |
4259668 | Nishimura et al. | Mar 1981 |
Number | Date | Country |
---|---|---|
2911853 | Apr 1979 | DEX |
Entry |
---|
Sprechende Uhr, Funkschau, 17/1981, pp. 63-66, Kraekel. |