Number | Date | Country | Kind |
---|---|---|---|
8445/76 | Mar 1976 | GBX | |
50956/76 | Dec 1976 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
486308 | Watt | Nov 1892 | |
1668328 | Martien | May 1928 | |
3215435 | Rheingruber | Nov 1965 | |
3356369 | Stubbmann | Dec 1967 | |
3568357 | Lebensfeld | Mar 1971 | |
4022473 | Foley | May 1977 |
Number | Date | Country |
---|---|---|
384000 | May 1924 | DE2 |
841559 | Jun 1952 | DEX |
Entry |
---|
Aids & Appliances, Eighteenth Edition, Jul. 1972-Jun. 1973, p. 10. |