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SE7807594L
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Digital echo eliminator
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FI751847A
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Anordning vid ett mobilradiosystem
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DK628374A
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Circuit for radio receivers which select a radio signal with a special mark
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FI57504B
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Avsoekningsanordning innefattande ett bandpassfilter
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FI57678B
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Mobilradioanlaeggning
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GB1387439A
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Mobile radio communication system
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GB1387437A
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Mobile radio communication system
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NL176034C
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Radio system for message exchange via a single radio channel.
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GB1316511A
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Arrangement for amplitude limitation in an esentially sinsoidal ac-signal with subsequent multiplication of the frequency
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DE2003093A1
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Method for detecting the envelope of an AC voltage signal and arrangement for carrying out the method
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DE2003092A1
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Oscillator arrangement
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