Number | Name | Date | Kind |
---|---|---|---|
2543338 | Schmidt et al. | Feb 1951 | |
3222176 | Jaeken | Dec 1965 | |
4009035 | Kojima et al. | Feb 1977 | |
4988614 | Ishige et al. | Jan 1991 |
Number | Date | Country |
---|---|---|
2529991 | Jan 1976 | DEX |
1-241552 | Sep 1989 | JPX |
Entry |
---|
Mees and James, The Theory of the Photographic Process 3rd edition, p. 387, 1966. |