Episode 2 of 2
Patent Grant
- When
- May 23, 1829
- Where
- Vienna
The patent for the accordion was officially granted on May 23, 1829, following the initial presentation.
The grant confirmed Demian's design, which included instruments with bass and treble sections, though he preferred the bass-only version for its practical advantages in cost and weight.
Sources
- Cyrill Demian Wikipedia, revision of 2026-03-30
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.