4. Stock material or miscellaneous articles
  5. Circular sheet or circular blank
  6. Recording medium or carrier

Donald J. Kerfeld

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Check disk for optical data storage disk manufacturing

Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Light polarizing article or holographic article
Reexamination Certificate

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Information carrying discs

Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent

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Metallized information carrying discs

Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent

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Metallized information carrying discs

Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent

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Multi-generation stampers

Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Light polarizing article or holographic article
Reexamination Certificate

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Profile ID: LFUS-PAI-P-797356

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