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Robert D. Evans

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Active selective headset

G - Physics – 10 – K
Patent

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Active/passive headset with speech filter

G - Physics – 01 – K
Patent

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Circuit control apparatus

H - Electricity – 02 – M
Patent

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Directional ground relay

H - Electricity – 02 – H
Patent

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Electric regulating system

Uncategorized
Patent

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Secondary carpet backing fabrics

D - Textiles – Paper – 02 – G
Patent

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Profile ID: LFCA-PAI-P-5259

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