High recording density optical disc
High write speed erasable optical recording disk using active se
High-definition optical disk and high-definition optical...
High-density optical disc
High-density optical disc, method for recording and...
High-density optical disc, method for recording and...
High-density optical information recording medium and a...
High-density optical recording media and method for making same
High-density reproduction-only optical disc and method for...
Holder for a rigid information disc and loading-system comprisin
Homogeneous composition of microcrystalline semiconductor materi
Hub-chucking type disklike recording means
Hubless optical disc having low radial runout and method of manu
Hybrid disc and method and apparatus for discriminating same
Hybrid discs
Hybrid discs displaying certain dimensional values
Hybrid disk and method of writing data to and/or reading...
Hybrid optical data carrier having a modified CD layer
Hybrid optical disc construction
Hybrid optical disc construction