Number | Name | Date | Kind |
---|---|---|---|
3118010 | Harrington | Jan 1964 | |
3225413 | Bird et al. | Dec 1965 | |
3277219 | Turner | Oct 1966 | |
3357142 | Furrer et al. | Dec 1967 | |
3668287 | Mackie | Jun 1972 |
Entry |
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Principles of Pneumatic Architecture, Roger Dent. (c) 1972, William Clowes & Sons, Ltd. pp. 51-57. |