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US2915681A
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Magnet assemblies
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US2877929A
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Slurry feeder
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US2812203A
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Permanent magnet holding arrangement
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US2864417A
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Magnetic hammer
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US2884572A
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Magnetic chuck
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US2862619A
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Method and apparatus for overcoming reluctance in material which is in process of magnetic separation and concentration
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US2778580A
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Driving, braking and reeling means for an elongated strip
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US2740553A
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Automatic measuring liquid dispenser
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US2647954A
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Method of magnetically recording and mechanism therefor
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US2553792A
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Ion trap and centering magnet assembly
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US2549602A
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Applicator for ion traps
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US2723315A
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Method and means for duplicating magnetic records by magnetic transfer phenomenon
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US2503619A
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Magnetic sandpaper holder
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US2539876A
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Electromagnetic transducer head and energizing circuit therefor
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US2598846A
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Fly rod reel
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US2505130A
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Inductor generator
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US2574898A
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Electromagnetic transducer head assembly
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US2546927A
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Polarizing head for magnetic recorders
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US2515414A
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Telephone receiver
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US2573427A
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Can-opening device
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