Number | Name | Date | Kind |
---|---|---|---|
3198820 | Pines et al. | Aug 1965 | |
3248329 | Pines et al. | Apr 1966 | |
3312622 | Pines et al. | Apr 1967 | |
3337496 | Pines et al. | Aug 1967 | |
3341469 | Pines et al. | Sep 1967 | |
4333843 | Wing et al. | Jun 1982 | |
4367154 | Jernigan | Jan 1983 |
Entry |
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U.K. Patent Application, 2,018,266, Plueddemann, 10-1979. |