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Class Information
Number: 720/721
Name: Dynamic optical information storage or retrieval > Optical storage medium structure > Disk hub
Description: Subject matter including details of the structure which encircles the central opening of the optical storage medium.

Sub-classes under this class:

Class Number Class Name Patents
720/722 Hub material or composition 33
720/723 Including clamping plate 13
720/724 Providing a centering protrusion or projection 24

Patents under this class:

Patent Number Title Of Patent Date Issued
8307386 Optical disc with thicker supporting section and thinner recording section Nov. 6, 2012
7774806 Thin optical disc having remote reading capability Aug. 10, 2010
7694225 Method and apparatus for producing a packaged presentation Apr. 6, 2010
7673309 Scalable integrated high density optical data/media storage delivery system Mar. 2, 2010
7673310 Optical disc having a reduced planar thickness Mar. 2, 2010
7646563 Recording disk cartridge having a plurality of flexible recording disk media Jan. 12, 2010
7562374 Form factor disk Jul. 14, 2009
7523473 Disc shaped optical record carrier Apr. 21, 2009
7512960 Hub-mounted optical disk having a reduced height Mar. 31, 2009
7478413 Optical recording medium Jan. 13, 2009
7249363 Spindle motor, information recording and reproducing apparatus having a spindle motor, and manufacturing method of spindle motor Jul. 24, 2007
7197756 Optical disk having a projection with lateral inclined surface Mar. 27, 2007
7096480 Data storage disk capable of limiting extension of crack Aug. 22, 2006
6817026 Magnetic hub assembly for data storage disk Nov. 9, 2004
6704275 Optical recording medium and disc cartridge having 2 GB capacity Mar. 9, 2004
6600627 Rotational driving apparatus for disk and manufacturing method therefor Jul. 29, 2003
6449124 Computer diskette with insertable multi-piece media Sep. 10, 2002
6297931 Recording disk with round spindle hole in magnetic hub and prerecorded tracking servo information Oct. 2, 2001
6292461 Hub-chucking type disklike recording means Sep. 18, 2001
6285651 Optical disc for optical storage system Sep. 4, 2001
5999513 Optical disc substrate having relatively thicker central supporting portion and relatively thinner recording portion Dec. 7, 1999
5956316 System comprising optical discs and a scanning device Sep. 21, 1999
5896356 Splitting cartridge and the removable cartridge disk drive in which it is used Apr. 20, 1999
5864534 Optical data storage disc having low-profile hub Jan. 26, 1999
5774446 Segmented audio and visual compact disks Jun. 30, 1998
5657311 Disc-shaped recording medium with hub structure Aug. 12, 1997
5587994 Cartridge used for a disc-shaped recording medium Dec. 24, 1996
5572509 Method for mounting magnetic plate to disc substrate Nov. 5, 1996
5353278 Magneto-optical disk and method of manufacturing the same Oct. 4, 1994
5315579 Recording disk hub bond May. 24, 1994
5289456 Method of forming a magneto-optical disk hub in which the inner peripheral edge portion of the spindle opening is strengthened and made abrasion resistant Feb. 22, 1994
5265086 Information recording disk Nov. 23, 1993
5258976 Method of assembling reproduction-only discs for a reproduction/recording apparatus Nov. 2, 1993
5257152 Disk drive apparatus having a spindle permitting a thinner disk drive Oct. 26, 1993
4983439 Method of manufacturing a recording medium and recording medium Jan. 8, 1991
4944982 Information recording medium having magnetizable hub Jul. 31, 1990
4835762 Optical memory device and system May. 30, 1989
4829510 Disk for recording and/or reproducing apparatus having magnetic chucking device May. 9, 1989
4710913 Optical recording disc Dec. 1, 1987
4658393 Optical memory disc Apr. 14, 1987
4571718 Optical disk cartridge and cooperating apparatus Feb. 18, 1986

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