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Class Information
Number: 260/998.16
Name: Chemistry of carbon compounds > Sound record
Description: Products under Class 520 ... which are intended for use in making records of sound or which are used to reproduce sound (e.g., phonograph records, etc.) by other than magnetic means.

Patents under this class:

Patent Number Title Of Patent Date Issued
4827466 Information signal recording medium electrostatic capacitance type May. 2, 1989
4435802 Synthetic resin material, particularly surface material for phonograph records with a photograph or picture Mar. 6, 1984
4412941 Recording disc compositions comprising polymers of monovinyl-substituted hydrocarbons, conductive carbon black and lubricants Nov. 1, 1983
4299736 Conductive molding composition and discs therefrom Nov. 10, 1981
4283315 Gramophone record composition Aug. 11, 1981
4283310 P.V.C. Compositions for extrusion moulding Aug. 11, 1981
4241120 Video discs and molding compositions therefor Dec. 23, 1980
4228050 Conductive molding composition Oct. 14, 1980
4151132 Molding composition Apr. 24, 1979
4129536 Vinyl chloride based injection molding composition Dec. 12, 1978
3975321 Sound reproduction compositions Aug. 17, 1976
3960790 Disc record and method of compounding disc record composition Jun. 1, 1976

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