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Class Information
Number: 428/64.1
Name: Stock material or miscellaneous articles > Circular sheet or circular blank
Description: Product whose outer boundary is that of a single curved line every point of which is substantially the same distance from a point at the center thereof.

Sub-classes under this class:

Class Number Class Name Patents
428/66.6 Aperture containing 207
428/66.7 Edge structure 103
428/66.3 End closure 70
428/66.2 Frictional 78
428/66.1 Gear 12
428/66.5 Ornamental, decorative, pattern, or indicia 84
428/64.2 Recording medium or carrier 361
428/66.4 Seal, gasket, or packing 135

Patents under this class:

Patent Number Title Of Patent Date Issued
8709572 Fabrication of high gradient insulators by stack compression Apr. 29, 2014
8709571 Disc shaped high density recording medium Apr. 29, 2014
8709570 Near-field optical disk having surface plasmon amplification by stimulated emission of radiation Apr. 29, 2014
8709569 Optical recording medium, and method for producing optical recording medium Apr. 29, 2014
8691358 Component provided with a machine-readable identification Apr. 8, 2014
8691357 Pressure-sensitive adhesive sheet for optical data recording medium, optical data recording medium, and method and device for reproducing data from optical data recording medium Apr. 8, 2014
8691356 Disk and process for producing base material for disk, and disk roll Apr. 8, 2014
8685518 Information recording medium and method for producing same Apr. 1, 2014
8685517 Optical recording medium Apr. 1, 2014
8679611 Edge protection seal for bonded substrates Mar. 25, 2014
8673422 Process for encapsulating an electro-optical device Mar. 18, 2014
8673420 Master disc having a PTM layer and a nickel undercoat Mar. 18, 2014
8668787 Silver alloy, sputtering target material thereof, and thin film thereof Mar. 11, 2014
8663771 Optical media having graphene wear protection layers Mar. 4, 2014
8659022 Hybrid silicon wafer Feb. 25, 2014
8652607 Image recording media and imaging layers Feb. 18, 2014
8647747 Hybrid silicon wafer and method of producing the same Feb. 11, 2014
8642155 Information storage medium using nanocrystal particles, method of manufacturing the information storage apparatus including the information storage medium Feb. 4, 2014
8642154 Silicon carbide crystal ingot, silicon carbide crystal wafer, and method for fabricating silicon carbide crystal ingot Feb. 4, 2014
8642153 Single crystal silicon carbide substrate and method of manufacturing the same Feb. 4, 2014
8642152 Optical information recording medium Feb. 4, 2014
8632871 Film for producing a sheet for a multilayer optical recording medium Jan. 21, 2014
8632870 Recording layer for optical information recording medium and optical information recording medium Jan. 21, 2014
8632869 Metal alloys for the reflective or the semi-reflective layer of an optical storage medium Jan. 21, 2014
8623486 Hybrid disc, method and system of forming the disc Jan. 7, 2014
8623136 Asymmetrical wafer configurations and method for creating the same Jan. 7, 2014
8617694 Discretely tailored multi-zone bondline for fail-safe structural repair Dec. 31, 2013
8611202 Optical storage medium comprising two nonlinear layers Dec. 17, 2013
8609217 Optical recording media with specific vision label layer Dec. 17, 2013
8603602 Optional disk and method for manufacturing the same Dec. 10, 2013
8597757 Recording layer for optical information recording medium, optical information recording medium, and sputtering target Dec. 3, 2013
8597756 Resistance heated sapphire single crystal ingot grower, method of manufacturing resistance heated sapphire single crystal ingot, sapphire single crystal ingot, and sapphire wafer Dec. 3, 2013
8592021 Disk roll and base material for disk roll Nov. 26, 2013
8582108 Integrated plasmonic sensing device and apparatus Nov. 12, 2013
8580368 Information recording medium and method for manufacturing the same Nov. 12, 2013
8574699 Recording medium and method for manufacturing recording medium Nov. 5, 2013
8574529 Silicon carbide crystal and method of manufacturing silicon carbide crystal Nov. 5, 2013
8568851 Method for manufacturing optical information recording medium, and optical information recording medium Oct. 29, 2013
8563111 Digital information media having adhesion promotion layer on a substrate Oct. 22, 2013
8563110 Optical data media containing an ultraviolet protection layer Oct. 22, 2013
8557362 Optical recording medium and method for manufacturing the same Oct. 15, 2013
8557361 Optical disc with thermally-printable surface Oct. 15, 2013
8545957 Optical information recording medium and manufacturing method thereof and optical information recording medium recording layer Oct. 1, 2013
8541088 Optical recording media and method of forming a printable layer thereon Sep. 24, 2013
8541087 Pressure-sensitive adhesive, sheet for manufacturing an optical recording medium and optical recording medium Sep. 24, 2013
8541086 Optical information recording medium and method for manufacturing the same Sep. 24, 2013
8535792 Polyetherimide resins with very low levels of residual contamination Sep. 17, 2013
8535775 Optical recording medium Sep. 17, 2013
8535441 Crystal growth crucible lid Sep. 17, 2013
8530140 Optical information recording medium and method for manufacturing the same Sep. 10, 2013

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