4. Plastic and nonmetallic article shaping or treating: processes
  5. Forming sound grooves in records
  6. Die pressing disk type records

Adelbert Zielasek

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Method for manufacturing disk-shaped information carriers

Plastic and nonmetallic article shaping or treating: processes – Forming sound grooves in records – Die pressing disk type records
Patent

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Storage cassette for high storage density, disc-shaped informati

Special receptacle or package – For holding a machine readable recording medium – For holding a grooved phonograph disc
Patent

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Profile ID: LFUS-PAI-P-1359766

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