| Number | Date | Country | Kind |
|---|---|---|---|
| 1-223704 | Aug 1989 | JPX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4625731 | Quedens et al. | Dec 1986 | |
| 4870954 | Satoh | Oct 1989 |
| Number | Date | Country |
|---|---|---|
| 3821074 | Jan 1989 | DEX |
| Entry |
|---|
| Soldner, R. et al "The Vidoson 735--A New Real-Time Scanner for Ultrasonography", Electromedica 3-477, Germany pp. 107-112. |