Number | Name | Date | Kind |
---|---|---|---|
1305962 | Crabtree | Jun 1919 | |
1389742 | Crabtree | Sep 1921 | |
1776155 | Kogel | Sep 1930 | |
1945772 | Dassonville | Feb 1934 | |
2264334 | Schmidt | Dec 1941 | |
2533182 | Sargent | Dec 1950 | |
3660092 | Frank et al. | May 1972 |
Number | Date | Country |
---|---|---|
59-44773 | Mar 1984 | JPX |
670883 | Apr 1952 | GBX |
701843 | Jan 1954 | GBX |
Entry |
---|
Tanaka et al., Photo. Sci. Eng., 25(1), pp. 32-34 (1981). |
Schilt, Talanta, 13, pp. 895-902 (1966). |