| Riter Engineering Co (Elko, NV)
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| Riverside Power Transmission (Philadelphia, PA)
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| Robertson Worldwide (Blue Island, IL)
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| Rockland Insulated Wire Co (Haverstraw, NY)
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| Romma Manufactureing (Wyoming, MI)
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| Rpi Transformers (Vista, CA)
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| Rural Electric (Universal City, TX)
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| Rushing Aviation (Marks, MS)
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| Safety Limited (West Chicago, IL)
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| Saisa North America Inc (Miami, FL)
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| Salem Co (Woodstown, NJ)
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| Sara International (Houston, TX)
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| Sci Electronics Inc (Los Altos, CA)
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| Scott Engineering Co (Auburn, IN)
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| Sentinel Power Inc (New Stanton, PA)
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| Sew-Eurodrive Inc (Cary, IL)
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| Shafer Magnetic Components (Montclair, CA)
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| Shape Inc (Pleasanton, CA)
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| Sherwin Industries Inc (Milwaukee, WI)
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| Shingle & Gibb Co (York, PA)
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| Signal Transformer Co Inc (Inwood, NY)
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| Sita Utell Int'L-Reed Int'L (Oak Brook, IL)
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| Smarte Carte Inc (Morrisville, NC)
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| Smarte Carte Inc (Detroit, MI)
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| Snyder Associates (Plainview, NY)
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