Number | Name | Date | Kind |
---|---|---|---|
2532011 | Dahlquist et al. | Nov 1950 | |
2607711 | Hendricks | Aug 1952 | |
3318852 | Dixon | May 1967 | |
3673135 | Blake et al. | Jun 1972 | |
3681105 | Milutin et al. | Aug 1972 |
Number | Date | Country |
---|---|---|
2140439 | Nov 1984 | GBX |
Entry |
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Kodak Publication No. GN-350, Jul. 1983. |
Kodak Publication No. GN-355, Nov. 1983. |
Toyo Kasei Kogyo Co. Ltd., Hardlen Publication. |