Patented April 15, 1890
If an object in your hands says PAT. APRIL 15, 1890, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 425,935 | MUSIC-SHEET FOR MECHANICAL MUSICAL INSTRUMENTS. | Friedrich Ernst Paul Ehrlich | Gohlis, near Leipsic, Saxony, Germany |