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1984-02-14
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1965-06-15
Automatic call transmitter
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1958-07-17
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(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html )
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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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(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html )
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1962-12-11
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(c_deeref_Disk_and_Scratch_Disk_Pools_and_Their_Defaults.html )
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1916-02-03
Improvements in Telephone Exchange Systems.
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