| Number | Date | Country | Kind |
|---|---|---|---|
| 1733/87 | Jul 1987 | ATX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 1249411 | Joseph | Dec 1917 | |
| 1528087 | Sheridan et al. | Mar 1925 | |
| 1555566 | Furste | Sep 1925 | |
| 3726412 | Resnicoff | Apr 1973 | |
| 4190151 | Russell | Feb 1980 | |
| 4424106 | Rossoshiwsky et al. | Jan 1984 | |
| 4424906 | Richmond | Jan 1984 |
| Number | Date | Country |
|---|---|---|
| 3511484 | Oct 1986 | DEX |
| 1157993 | Jun 1958 | FRX |
| 1462451 | Dec 1966 | FRX |
| 2440571 | Jul 1980 | FRX |
| Entry |
|---|
| Great Britain Specification No. 945,937. |