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(en )
1984-02-14
System for entering and processing gamble stakes
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1965-06-15
Automatic call transmitter
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1958-07-17
Schaltungsanordnung fuer Fernsprech-Vermittlungseinrichtungen
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1964-12-08
Ticketer with magnetic memory
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1962-07-24
Postpay paystation circuit providing special service
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1916-02-03
Improvements in Telephone Exchange Systems.
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