Number | Name | Date | Kind |
---|---|---|---|
1939796 | Spowart | Dec 1933 | |
3275300 | Delacour et al. | Sep 1966 | |
3481584 | Conry et al. | Dec 1969 | |
3557865 | Gallucci | Jan 1971 | |
3658222 | Dressel et al. | Apr 1972 | |
3693939 | Buckson | Sep 1972 | |
3841407 | Bozeman | Oct 1974 |
Number | Date | Country |
---|---|---|
846497 | Jul 1981 | SUX |
Entry |
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Juntaro Ishibashi et al., "Optical Fiber Cable Installing Technique in Underground Plant", Japan Telecommunications Review, Jul. 1981, pp. 261-270. |