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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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