| 21. | Magnetic recording was demonstrated in principle as early as 1898 by Valdemar Poulsen in his telegraphone.
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| 22. | Before magnetic recording, a double-system sound recorder was either a sound camera or a phonograph lathe.
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| 23. | Lauderdale, Florida, on audio systems and magnetic recording.
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| 24. | The drums had a plated magnetic recording surface.
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| 25. | HAMR could eventually increase the limit of magnetic recording by more than a factor of 100.
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| 26. | It has operations in commodity chemicals, plastics, dyes and paints, agricultural products, and magnetic recording media.
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| 27. | Magnetic recording on steel tape and wire was invented during World War II for recording audio.
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| 28. | The magnetic recording was demonstrated in principle as early as 1898 by Valdemar Poulsen in his telegraphone.
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| 29. | Dictaphone in turn added magnetic recording models while still selling the models recording on the Lexan belts.
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| 30. | The most significant advance is a new type of magnetic recording head known as a magneto-resistive head.
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