Number | Date | Country | Kind |
---|---|---|---|
58-198821 | Oct 1983 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2415732 | Domingo | Feb 1947 | |
2809554 | Bernhardt | Oct 1957 | |
4351584 | Chandesais | Sep 1982 |
Number | Date | Country |
---|---|---|
593228 | Feb 1934 | DE2 |
975784 | Sep 1962 | DEX |
Entry |
---|
Hooff, et al., "Description of a Dark-Field Illuminator Cone for Dissecting Microscope", Microscopica Acta., vol. 85, #1, 9-1981, pp. 17-18. |