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1966-11-16 |
1971-02-09 |
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1966-11-16 |
1970-09-22 |
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1966-11-17 |
1970-09-01 |
Communications Satellite Corp |
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1968-01-30 |
1972-02-01 |
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1968-03-13 |
1970-10-06 |
Nasa |
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1968-07-31 |
1971-07-13 |
Nasa |
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1971-02-23 |
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1969-04-07 |
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1969-10-15 |
1972-04-04 |
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1976-03-02 |
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1976-11-02 |
1978-09-26 |
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Narrow-band radio communication system
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1978-04-28 |
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