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US4310923A
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Two-way transceiver including frequency synthesizer
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Modular radio
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Navigating device
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Modular radio
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Portable transceiver
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Channel selector system
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Versatile transceiver coupling network
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Multi-channel R.F. transducer with channel selector coupled to selected channel filter
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US3896445A
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Electronic bandswitching for automatic direction finder
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Dual mount electronic device
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US3794938A
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Coupled bandstop/bandpass filter
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Switched and summed filter arrangement
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Aircraft proximity warning indicator
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Inverter with zener-regulated output frequency and voltage
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Device for automatically identifying unknown transistors
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Method and electrical circuit for processing airport runway localizer and glideslope information
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US3486125A
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High gain amplifier
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