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US3825775A
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Circuit arrangement for converting square waves into asymmetrical rectangular waves
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US3725560A
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Chord playing organ
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US3708604A
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Electronic organ with rhythmic accompaniment and bass
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US3717065A
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Key indicating device
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US3767834A
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Electronic organ with player controlled muted brass effects
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US3738216A
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Keyboard for musical instruments
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US3663114A
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Tape controlled automatic machine, especially for printed circuit boards
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US3535970A
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Pedal circuit for electronic organ
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US3497605A
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Circuit for obtaining repeater and percussion effects in an electrical musical instrument utilizing a field effect transistor
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US3497604A
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Two-channel amplifier system with differential output for a third speaker
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US3422209A
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Electronic organ having perforated roll controlled playing mechanism
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US3421403A
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Apparatus for making rolls for player pianos and organs
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US3389211A
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Electronic keyer
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US3374316A
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Circuit for electronic organ for producing muted voices by the use of photosensitive cells
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US3333043A
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Photocell controlled repeater circuit
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US3267196A
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Electronic tremolo device
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US3327047A
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Combination of selector switch and knee control
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