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US 4,812,633 AGranted
Optical data card
AssigneeMinnesota Mining and Manufacturing Company
InventorsPeter J. Vogelgesang, John W. Ulseth, Norman L. Giorgini, Jathan D. Edwards
Life of this patent
Estimating the term…
Abstract
A wallet-sized data card includes a magneto-optic active region configured for rotational recording of data. A fender projecting outwardly from the card is disposed adjacent an outer circumference of the recording region for protecting the magneto-optic recording region.
Claims13
A data card comprising:
- a substrate having a magneto-optic active region configured for rotational recording of data;
- and
- first fender means for protecting the magneto-optic recording region disposed adjacent an outer circumference of the recording region.
A method of making a data card comprising:
- providing a rectangular substrate and an optical disk having a magneto-optic medium for recording of data in a magneto-optic active area, the disk being smaller in diameter than the width and length of the substrate;
- forming an area of the substrate sufficient in diameter to accept the disk and sufficient in depth such that a top surface of the disk is substantially even with a top surface of the substrate;
- and
- joining the disk to the substrate.
1 more element
A method of making a data card comprising:
- providing a substrate having an aperture therein;
- providing an optical disk having a magneto-optic medium for recording of data in a magneto-optic active area, the disk having a diameter equal to or smaller in diameter than the aperture of the substrate:
- positioning the disk within the aperture;
- and
- fixedly attaching the disk to the substrate within the aperture.
2 more elements
Dependencies are inferred from the claim text.