Douglas M. Carson

Substrate alignment detection using circumferentially extending timing pattern

Substrate alignment detection using circumferentially extending timing pattern

Substrate alignment through detection of rotating timing pattern

Image archive disc

Image archive disc

Authenticating a data transmission by varying a rate thereof

Authenticating a data transmission by varying a rate thereof

Creating an XY image pattern on a rotating substrate

Hidden patterns on a data storage medium

Writing repeating patterns of features to a substrate

Data storage medium with improved multi-session recording format

Deflection reference adjustment for variable track pitch media

Sequencing data blocks to provide hidden data on a recording medium

Media Pre-Write With Track-Aligned Write Beam Deflection and Write Frequency Adjustment

Multi-Session Pre-Recorded Storage Medium

Variable track width recording compensation

Identifier tag to track layers in a multi-layer optical disc

Compensation for different transducer translation path geometries

Authenticating a data storage medium using predetermined inter-sector relationships

Verifying provenance data associated with digital content

Storage medium with separate image and data tracks

Media authentication using altered sector sizes

Radial separation distance determination for a data storage medium

Multi-layer optical disc format

Detection of a digital data fingerprint