Inventor · disambiguated record

Edward Roll

Also filed as: ROLL EDWARD

1 granted patent·61 citations·filing 1973–1973

50Inventor score

Technology areasA63B

Files withMICHAELS HERBERT1

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1 record

0179US4015344AAudio visual teaching method and apparatusMICHAELS HERBERT·Filed 1973·Granted Apr 5, 1977·61 cites·6 claims

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