Number | Date | Country | Kind |
---|---|---|---|
80200949.8 | Oct 1980 | EPX |
Number | Name | Date | Kind |
---|---|---|---|
3904412 | Serrien et al. | Sep 1975 |
Number | Date | Country |
---|---|---|
964773 | Jul 1964 | GBX |
Entry |
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Journal of Applied Photographic Engineering, vol. 5, No. 3, Summer 1979, Image Technology, pp. 169-171. |