Number | Date | Country | Kind |
---|---|---|---|
90 18 973.9 | Aug 1990 | GBX |
Filing Document | Filing Date | Country | Kind | 102e Date | 371c Date |
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PCT/GB91/01352 | 8/8/1991 | 2/18/1993 | 2/18/1993 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO92/04785 | 3/19/1992 |
Number | Name | Date | Kind |
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4533247 | Epworth | Aug 1985 |
Number | Date | Country |
---|---|---|
3232429A1 | Mar 1993 | DEX |
2094593 | Sep 1982 | GBX |
Entry |
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Applied Optics, vol. 24, No. 22, 15 Nov. 1985, pp. 3877-3882. |
Optical Communications Based on Coincident Photon Pairs, Hong et al., cited in the application, see p. 3877. |
Secure Communication System Using Short Coherence Length Sources, Yao et al. |