EntityQ3495504· pop 12· linked from 27 articlesJohn DopyeraSign in to saveSlovak inventor (1893–1988)ConnectionsAmpegEntitySlovakiaCountryCaliforniaEntityChicagoEntityLos AngelesEntityOregonEntityBob DylanPersonSlovakEntityviolinEntityInternational Standard Book NumberEntityAustria–HungaryEntityinventionEntityTrnavaEntityAmericansEntityelectric guitarEntitystring instrumentEntitySlovaksEntityentrepreneurshipEntityvaudevilleEntityGrants PassEntityCategories1893 births1988 deaths20th-century American inventorsAmerican people of Slovak descentEmigrants from Austria-Hungary to the United StatesInventors of musical instrumentsPeople from Senica DistrictSlovak inventors