Urheberschaft
- Risch, August1
- Ritter, August1
- Ritter, Carl1
- Ritter, Fritz1
- Ritter, Gustav A.1
- Ritter, Johann Wolfgang1
- Rittershain, Gottfried von1
- Rittershausen, Konrad1
- Rixius, Peter1
- Rober Josef Castor1
- Robert Schaefer (Firma)1
- Robert Thomas Elektrowerke1
- Robida, Albert1
- Robinson, Armin1
- Robot Berning & Co.1
- Rodenstock1
- Rodenstock GmbH1
- Rodewald, Heinrich August Sigmund1
- Rodolph, Johann Rudolph1
- Roeder, Georg Wilhelm1