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Tone generator
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Patent number 4,286,257
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Issue date Aug 25, 1981
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Lectron Products, Inc.
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Michael Slavin
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B60 - VEHICLES IN GENERAL
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Tone generator
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Patent number 4,257,036
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Issue date Mar 17, 1981
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Lectron Products, Inc.
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Michael Slavin
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G08 - SIGNALLING
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Tone generator
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Patent number 4,232,287
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Issue date Nov 4, 1980
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Lectron Products, Inc.
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Michael Slavin
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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