The ancestor of the modern electrolytic capacitor was patented by Samuel Ruben in 1925, who teamed with Philip Mallory, the founder of the battery company that is now known as Duracell International.
Strămoșul condensatoarelor electrolitice moderne a fost patentat de către Samuel Ruben în 1925, care a făcut echipă cu Philip Mallory, fondator al companiei de baterii care este acum cunoscut sub numele de Duracell International.