Number | Name | Date | Kind |
---|---|---|---|
2640100 | Packer et al. | May 1953 |
Number | Date | Country |
---|---|---|
604469 | Jan 1934 | DE2 |
47457 | Sep 1927 | NOX |
155905 | Sep 1932 | CHX |
591766 | Jan 1947 | GBX |
Entry |
---|
Roumainis, S. J.; "The Null Point..."; AIEE Transactions; Apr. 1956; pp. 147-152. |