Memorial of Francis Paul Becker praying the adoption of the Omnigraph patent process of engraving lettersFrancis Paul Becker · First published 1849Open the Tome
The respectful remonstrance of Francis Paul Becker, patentee of the Omnigraph, for engraving letters, etc., addressed to the honourable the Board of OrdnanceFrancis Paul Becker · First published 1849Open the Tome
