| http://www.w3.org/ns/prov#value | - Patent US4544958 - High-speed recording and reproducing of signals - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsApparatus for recording an analog signal employs n rotary heads (where n is a positive integer) which cooperate with a magnetic tape wound around a tape guide drum over an angular range of ????? (where ????? is less than or e
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