Number | Date | Country | Kind |
---|---|---|---|
52/21081 | Feb 1977 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3549554 | Hirayama et al. | Dec 1970 | |
3615764 | Krolla | Oct 1971 | |
3656976 | Izumitani | Apr 1972 | |
3743492 | Ogita | Jul 1973 | |
3846142 | Buzhinsky et al. | Nov 1974 |
Number | Date | Country |
---|---|---|
2,304,582 | Oct 1976 | FRX |
606,509 | Aug 1948 | GBX |
909,679 | Oct 1962 | GBX |
1,405,717 | Sep 1975 | GBX |
1,406,134 | Sep 1975 | GBX |
447,379 | Aug 1975 | SUX |
Entry |
---|
Pouwain, M. et al., "Verres Fluores au Tetraflorures de Zirconium Proprietes Optiques d'un Verre Dope au Nd.sup.3+ " Mat. Res. Bull., 10 (4) ,1975, pp. 243-246. |
Galant V. E., et al., "Optical Media--Methods of Producing Fluorphosphate Flints"--Sov., J. Opt. Tech., 41, (11), Nov. 1974, pp. 524-526. |