Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4602550 | Ruler for composing or decomposing the chords for any polyphonic musical instrument | Marcel Dadi | 1986-07-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4602550 | Ruler for composing or decomposing the chords for any polyphonic musical instrument | Marcel Dadi | 1986-07-29 |