Patents

Search tools Text Classification Chemistry Measure Numbers Full documents Title Abstract Claims All Any Exact Not Add AND condition These CPCs and their children These exact CPCs Add AND condition
Exact Exact Batch Similar Substructure Substructure (SMARTS) Full documents Claims only Add AND condition
Add AND condition
Application Numbers Publication Numbers Either Add AND condition

Classifications

H04R9/048 Construction in which the windings of the moving coil lay in the same plane of the ribbon type

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CS176967B1

Czechoslovakia


Worldwide applications
1975 SU HU DD SE GB CS DE 1976 US

Application CS8847A events
1975-12-23
Application filed