Inventor: Herschel L. Boll
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Inventor: James C. Mikkelsen
Inventor: James C. Mikkelsen
Inventor: James C. Mikkelsen
Inventor: James C. Mikkelsen
Inventor: James C. Mikkelsen
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Inventor: James C. Mikkelsen
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Inventor: Walter H. Jessel, Jr., William E. Duffett
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Inventor: Robert G. Jelly