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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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H03 - BASIC ELECTRONIC CIRCUITRY
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GTE Communications Systems Corporation
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H03 - BASIC ELECTRONIC CIRCUITRY
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GTE Lenkurt Incorporated
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H03 - BASIC ELECTRONIC CIRCUITRY
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GTE Lenkurt, Incorporated
Man S. Lee
H03 - BASIC ELECTRONIC CIRCUITRY
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Patent Grant
GTE Lenkurt Incorporated
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H03 - BASIC ELECTRONIC CIRCUITRY
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Patent Grant
GTE Automatic Electric Incorporated
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G06 - COMPUTING CALCULATING COUNTING
