Number | Name | Date | Kind |
---|---|---|---|
2723265 | Stallman | Nov 1955 | |
3515740 | Frampton et al. | Jun 1970 | |
3584045 | Feldman et al. | Jun 1971 | |
3624122 | Kamal et al. | Nov 1971 | |
3625986 | Feldman et al. | Dec 1971 | |
3787469 | Davis et al. | Jan 1974 | |
4113705 | Bock et al. | Sep 1978 |
Entry |
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Liberman et al., Doklady Akademii Nauk SSSR, vol. 201, No. 1, pp. 115-116, (1971). |